[Code of Federal Regulations] [Title 47, Volume 5] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR87.173] [Page 203-208] TITLE 47--TELECOMMUNICATION CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) PART 87_AVIATION SERVICES--Table of Contents Subpart E_Frequencies Sec. 87.173 Frequencies. (a) The table in paragraph (b) of this section lists assignable carrier frequencies or frequency bands. (1) The single letter symbol appearing in the ``Subpart'' column indicates the subpart of this part which contains additional applicable regulations. (2) The two or three letter symbol appearing in the ``Class of Station'' column indicates the class of station to which the frequency is assignable. (b) Frequency table: ---------------------------------------------------------------------------------------------------------------- Frequency or frequency band Subpart Class of station Remarks ---------------------------------------------------------------------------------------------------------------- 90-110 kHz........................... Q RL LORAN``C''. 190-285 kHz.......................... Q RLB Radiobeacons. 200-285 kHz.......................... O FAC Air traffic control. 325-405 kHz.......................... Q RLB Radiobeacons. 325-435 kHz.......................... Q RLB Radiobeacons. 410.0 kHz............................ F MA International direction- finding for use outside of U.S. 457.0 kHz............................ F MA Working frequency for aircraft on over water flights. 500.0 kHz............................ F MA International calling and distress frequency for ships and aircraft on over water flights. 510-535 kHz.......................... Q RLB Radiobeacons. 2182.0 kHz........................... F MA International distress and calling. 2371.0 kHz........................... ...................... ........................ [Reserved] 2374.0 kHz........................... ...................... ........................ [Reserved] 2648.0 kHz........................... I AX Alaska station. 2851.0 kHz........................... I, J MA, FAE, FAT International HF (AFI); Flight test. 2854.0 kHz........................... I MA, FAE International HF (SAT). 2866.0 kHz........................... I MA, FAE Domestic HF (Alaska). 2869.0 kHz........................... I MA, FAE International HF (CEP). 2872.0 kHz........................... I MA, FAE International HF (NAT). 2875.0 kHz........................... I MA, FAE Domestic HF. 2878.0 kHz........................... I MA1, FAE Domestic HF; International HF (AFI). 2887.0 kHz........................... I MA, FAE International HF (CAR). 2899.0 kHz........................... I MA, FAE International HF (NAT). 2911.0 kHz........................... I MA, FAE Domestic HF. 2932.0 kHz........................... I MA, FAE International HF (NP). 2935.0 kHz........................... I MA, FAE International HF (NP). 2944.0 kHz........................... I MA, FAE International HF (SAM and MID). 2956.0 kHz........................... I MA, FAE Domestic HF. 2962.0 kHz........................... I MA, FAE International HF (NAT). 2971.0 kHz........................... I MA, FAE International HF (NAT). 2992.0 kHz........................... I MA, FAE International HF (MID). 2998.0 kHz........................... I MA, FAE International HF (CWP). 3004.0 kHz........................... I, J MA, FAE, FAT International HF (NCA); Flight test. 3013.0 kHz........................... I MA, FAE Long distance operational control. 3016.0 kHz........................... I MA, FAE International HF (EA, NAT). 3019.0 kHz........................... I MA1, FAE Domestic HF; International HF ( (NCA). 3023.0 kHz........................... F, M, O MA1, FAR, FAC Search and rescue communications. [[Page 204]] 3281.0 kHz........................... K MA, FAS Lighter-than-air craft and aeronautical stations serving lighter-than-air craft. 3413.0 kHz........................... I MA, FAE International HF (CEP). 3419.0 kHz........................... I MA, FAE International HF (AFI). 3425.0 kHz........................... I MA, FAE International HF (AFI). 3434.0 kHz........................... I MA1, FAE Domestic HF. 3443.0 kHz........................... J MA, FAT 3449.0 kHz........................... I MA, FAE Domestic HF. 3452.0 kHz........................... I MA, FAE International HF (SAT). 3455.0 kHz........................... I MA, FAE International HF (CAR, CWP). 3467.0 kHz........................... I MA, FAE International HF (AFI, MID, SP). 3470.0 kHz........................... I MA, FAE Domestic HF and International HF (SEA). 3473.0 kHz........................... I MA, FAE International HF (MID). 3476.0 kHz........................... I MA, FAE International HF (INO, NAT). 3479.0 kHz........................... I MA, FAE International HF (EUR, SAM). 3485.0 kHz........................... I MA, FAE International HF (EA, SEA). 3491.0 kHz........................... I MA, FAE International HF (EA). 3494.0 kHz........................... I MA, FAE Long distance operational control. 4125.0 kHz........................... F MA Distress and safety with ships and coast stations. 4466.0 kHz........................... ...................... ........................ [Reserved] 4469.0 kHz........................... ...................... ........................ [Reserved] 4506.0 kHz........................... ...................... ........................ [Reserved] 4509.0 kHz........................... ...................... ........................ [Reserved] 4550.0 kHz........................... I AX Gulf of Mexico. 4582.0 kHz........................... ...................... ........................ [Reserved] 4585.0 kHz........................... ...................... ........................ [Reserved] 4601.0 kHz........................... ...................... ........................ [Reserved] 4604.0 kHz........................... ...................... ........................ [Reserved] 4627.0 kHz........................... ...................... ........................ [Reserved] 4630.0 kHz........................... ...................... ........................ [Reserved] 4645.0 kHz........................... I AX Alaska. 4657.0 kHz........................... I MA, FAE International HF (AFI, CEP). 4666.0 kHz........................... I MA, FAE International HF (CWP). 4669.0 kHz........................... I MA, FAE International HF (MID, SAM). 4672.0 kHz........................... I MA1, FAE Domestic HF. 4675.0 kHz........................... I MA, FAE International HF (NAT). 4678.0 kHz........................... I MA, FAE International HF (NCA). 4947.5 kHz........................... I AX Alaska. 5036.0 kHz........................... I AX Gulf of Mexico. 5122.5 kHz........................... I AX Alaska. 5167.5 kHz........................... I FA Alaska emergency. 5310.0 kHz........................... I AX Alaska. 5451.0 kHz........................... J MA, FAT 5463.0 kHz........................... I MA1, FAE Domestic HF. 5469.0 kHz........................... J MA, FAT 5427.0 kHz........................... I MA, FAE Domestic HF. 5484.0 kHz........................... I MA, FAE Domestic HF. 5490.0 kHz........................... I MA, FAE Domestic HF. 5493.0 kHz........................... I MA, FAE International HF (AFI). 5496.0 kHz........................... I MA, FAE Domestic HF. 5508.0 kHz........................... I MA1, FAE Domestic HF. 5520.0 kHz........................... I MA, FAE International HF (CAR). 5526.0 kHz........................... I MA, FAE International HF (SAM). 5529.0 kHz........................... I MA, FAE Long distance operational control. 5538.0 kHz........................... I MA, FAE Long distance operational control. 5547.0 kHz........................... I MA, FAE International HF (CEP). 5550.0 kHz........................... I MA, FAE International HF (CAR). 5559.0 kHz........................... I MA, FAE International HF (SP). 5565.0 kHz........................... I MA, FAE International HF (SAT). 5571.0 kHz........................... J MA, FAT ....................... 5574.0 kHz........................... I MA, FAE International HF (CEP). 5598.0 kHz........................... I MA, FAE International HF (NAT). 5616.0 kHz........................... I MA, FAE International HF (NAT). 5628.0 kHz........................... I MA, FAE International HF (NP). 5631.0 kHz........................... I MA, FAE Domestic HF. 5634.0 kHz........................... I MA, FAE International HF (INO). 5643.0 kHz........................... I MA, FAE International HF (SP). 5646.0 kHz........................... I MA, FAE International HF (NCA). 5649.0 kHz........................... I MA, FAE International HF (NAT, SEA). 5652.0 kHz........................... I MA, FAE International HF (AFI, CWP). 5655.0 kHz........................... I MA, FAE International HF (EA, SEA). 5658.0 kHz........................... I MA, FAE International HF (AFI, MID). 5661.0 kHz........................... I MA, FAE International HF (CWP, EUR). 5664.0 kHz........................... I MA, FAE International HF (NCA). [[Page 205]] 5667.0 kHz........................... I MA, FAE International HF (MID). 5670.0 kHz........................... I MA, FAE International HF (EA). 5680.0 kHz........................... F, M, O MA1, FAC, FAR Search and rescue communications. 5887.5 kHz........................... I AX Alaska. 6532.0 kHz........................... I MA, FAE International HF (CWP). 6535.0 kHz........................... I MA, FAE International HF (SAT). 6550.0 kHz........................... J MA, FAT 6556.0 kHz........................... I MA, FAE International HF (SEA). 6559.0 kHz........................... I MA, FAE International HF (AFI). 6562.0 kHz........................... I MA, FAE International HF (CWP). 6571.0 kHz........................... I MA, FAE International HF (EA). 6574.0 kHz........................... I MA, FAE International HF (AFI). 6577.0 kHz........................... I MA, FAE International HF (CAR). 6580.0 kHz........................... I MA, FAE Domestic HF. 6586.0 kHz........................... I MA, FAE International HF (CAR). 6592.0 kHz........................... I MA, FAE International HF (NCA). 6598.0 kHz........................... I MA, FAE International HF (EUR). 6604.0 kHz........................... I MA, FAE Domestic HF. 6622.0 kHz........................... I MA, FAE International HF (NAT). 6625.0 kHz........................... I MA, FAE International HF (MID). 6628.0 kHz........................... I MA, FAE International HF (NAT). 6631.0 kHz........................... I MA, FAE International HF (MID). 6637.0 kHz........................... I MA, FAE Long distance operational control. 6640.0 kHz........................... I MA, FAE Long distance operational control. 6649.0 kHz........................... I MA, FAE International HF (SAM). 6655.0 kHz........................... I MA, FAE International HF (NP). 6661.0 kHz........................... I MA, FAE International HF (NP). 6673.0 kHz........................... I MA, FAE International HF (AFI, CEP). 8015.0 kHz........................... I AX Alaska. 8364.0 kHz........................... F MA, Search and rescue communications. 8822.0 kHz........................... J MA, FAT 8825.0 kHz........................... I MA, FAE International HF (NAT). 8831.0 kHz........................... I MA, FAE International HF (NAT). 8843.0 kHz........................... I MA, FAE International HF (CEP). 8846.0 kHz........................... I MA, FAE International HF (CAR). 8855.0 kHz........................... I MA, FAE Domestic HF; International HF (SAM). 8861.0 kHz........................... I MA, FAE International HF (SAT). 8864.0 kHz........................... I MA, FAE International HF (NAT). 8867.0 kHz........................... I MA, FAE International HF (SP). 8876.0 kHz........................... I MA, FAE Domestic HF. 8879.0 kHz........................... I MA, FAE International HF (INO, NAT). 8891.0 kHz........................... I MA, FAE International HF (NAT). 8894.0 kHz........................... I MA, FAE International HF (AFI). 8897.0 kHz........................... I MA, FAE International HF (EA). 8903.0 kHz........................... I MA, FAE International HF (AFI, CWP). 8906.0 kHz........................... I MA, FAE International HF (NAT). 8918.0 kHz........................... I MA, FAE International HF (CAR, MID). 8933.0 kHz........................... I MA, FAE Long distance operational control. 8942.0 kHz........................... I MA, FAE International HF (SEA). 8951.0 kHz........................... I MA, FAE International HF (MID). 10018.0 kHz.......................... I MA, FAE International HF (MID). 10024.0 kHz.......................... I MA, FAE International HF (SAM). 10033.0 kHz.......................... I MA, FAE Long distance operational control. 10042.0 kHz.......................... I MA, FAE International HF (EA). 10045.0 kHz.......................... J MA, FAT 10048.0 kHz.......................... I MA, FAE International HF (NP). 10057.0 kHz.......................... I MA, FAE International HF (CEP). 10066.0 kHz.......................... I MA, FAE Domestic HF; International HF (SEA). 10075.0 kHz.......................... I MA, FAE Long distance operational control. 10081.0 kHz.......................... I MA, FAE International HF (CWP). 10084.0 kHz.......................... I MA, FAE International HF (EUR, SP). 10096.0 kHz.......................... I MA, FAE International HF (NCA, SAM). 11279.0 kHz.......................... I MA, FAE International HF (NAT). 11282.0 kHz.......................... I MA, FAE International HF (CEP). 11288.0 kHz.......................... J MA, FAT 11291.0 kHz.......................... I MA, FAE International HF (SAT). 11300.0 kHz.......................... I MA, FAE International HF (AFI). 11306.0 kHz.......................... J MA, FAT 11309.0 kHz.......................... I MA, FAE International HF (NAT). 11327.0 kHz.......................... I MA, FAE International HF (SP). 11330.0 kHz.......................... I MA, FAE International HF (AFI, NP). 11336.0 kHz.......................... I MA, FAE International HF (NAT). 11342.0 kHz.......................... I MA, FAE Long distance operational control. 11348.0 kHz.......................... I MA, FAE Long distance operational control. [[Page 206]] 11357.0 kHz.......................... I MA, FAE Domestic HF. 11360.0 kHz.......................... I MA, FAE International HF (SAM). 11363.0 kHz.......................... I MA, FAE Domestic HF. 11375.0 kHz.......................... I MA, FAE International HF (MID). 11384.0 kHz.......................... I MA, FAE International HF (CWP). 11387.0 kHz.......................... I MA, FAE International HF (CAR). 11396.0 kHz.......................... I MA, FAE International HF (CAR, EA, SEA). 13273.0 kHz.......................... I MA, FAE International HF (AFI). 13288.0 kHz.......................... I MA, FAE International HF (AFI, EUR, MID). 13291.0 kHz.......................... I MA, FAE International HF (NAT). 13294.0 kHz.......................... I MA, FAE International HF (AFI). 13297.0 kHz.......................... I MA, FAE International HF (CAR, EA, SAM). 13300.0 kHz.......................... I MA, FAE International HF (CEP, CWP, NP, SP). 13303.0 kHz.......................... I MA, FAE International HF (EA, NCA). 13306.0 kHz.......................... I MA, FAE International HF (INO, NAT). 13309.0 kHz.......................... I MA, FAE International HF (EA, SEA). 13312.0 kHz.......................... I, J MA, FAE, FAT International HF (MID); Flight test. 13315.0 kHz.......................... I MA, FAE International HF (NCA, SAT). 13318.0 kHz.......................... I MA, FAE International HF (SEA). 13330.0 kHz.......................... I MA, FAE Long distance operational control. 13348.0 kHz.......................... I MA, FAE Long distance operational control. 13357.0 kHz.......................... I MA, FAE International HF (SAT). 17904.0 kHz.......................... I MA, FAE International HF (CEP, CWP, NP, SP). 17907.0 kHz.......................... I MA, FAE International HF (CAR, EA, SAM, SEA). 17925.0 kHz.......................... I MA, FAE Long distance operational control. 17946.0 kHz.......................... I MA, FAE International HF (NAT). 17955.0 kHz.......................... I MA, FAE International HF (SAT). 17958.0 kHz.......................... I MA, FAE International HF (NCA). 17961.0 kHz.......................... I MA, FAE International HF (AFI, EUR, INO, MID). 17964.0 kHz.......................... J MA, FAT 21931.0 kHz.......................... J MA, FAT 21964.0 kHz.......................... I MA, FAE Long distance operational control. 26618.5 kHz.......................... ...................... ........................ [Reserved] 26620.0 kHz.......................... ...................... ........................ [Reserved] 26621.5 kHz.......................... ...................... ........................ [Reserved] 72.020-75.980 MHz.................... P FA, AXO Operational fixed; 20 kHz spacing. 75.000 MHz........................... Q RLA Marker beacon. 108.000 MHz.......................... Q RLT ....................... 108.000-117.950 MHz.................. Q RLO VHF omni-range. 108.000-117.975 MHz.................. Q DGP Differential GPS. 108.050 MHz.......................... Q RLT ....................... 108.100-111.950 MHz.................. Q RLL ILS localizer. 108.100 MHz.......................... Q RLT ....................... 108.150 MHz.......................... Q RLT ....................... 112-118 MHz.......................... Q DGP Differential GPS. 118.000-121.400 MHz.................. O MA, FAC, FAW, GCO, RCO, 25 kHz channel spacing. RPC 121.500 MHz.......................... G, H, I, J, K, M, O MA, FAU, FAE, FAT, FAS, Emergency and distress. FAC, FAM, FAP 121.600-121.925 MHz.................. I, O, L, Q MA, FAC, MOU, RLT, GCO, 25 kHz channel spacing. RCO, RPC 121.950 MHz.......................... K FAS ....................... 121.975 MHz.......................... F MA, FAW, FAC, MOU Air traffic control operations. 122.000 MHz.......................... F MA, FAC, MOU Air carrier and private aircraft enroute flight advisory service provided by FAA. 122.025 MHz.......................... F MA, FAC, MOU Air traffic control operations. 122.050 MHz.......................... F MA, FAC, MOU Air traffic control operations. 122.075 MHz.......................... F MA, FAW, FAC, MOU Air traffic control operations. 122.100 MHz.......................... F, O MA, FAC, MOU Air traffic control operations. 122.125-122.675 MHz.................. F MA, FAC, MOU Air traffic control operations; 25 kHz spacing. 122.700 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 122.725 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 122.750 MHz.......................... F MA2 Private fixed wing aircraft air-to-air communications. 122.775 MHz.......................... K MA, FAS ....................... 122.800 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. [[Page 207]] 122.825 MHz.......................... I MA, FAE Domestic VHF 122.850 MHz.......................... H, K, MA, FAM, FAS ....................... 122.875 MHz.......................... I MA, FAE Domestic VHF 122.900 MHz.......................... F, H, L MA, FAR, FAM, MOU ....................... M 122.925 MHz.......................... H MA2, FAM ....................... 122.950 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 122.975 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 123.000 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 123.025 MHz.......................... F MA2 Helicopter air-to-air communications; Air traffic control operations. 123.050 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 123.075 MHz.......................... G, L MA, FAU, MOU Unicom at airports with no control tower; Aeronautical utility stations. 123.100 MHz.......................... M, O MA, FAC, FAR ....................... 123.125 MHz.......................... J MA, FAT Itinerant. 123.150 MHz.......................... J MA, FAT Itinerant. 123.175 MHz.......................... J MA, FAT Itinerant. 123.200 MHz.......................... J MA, FAT ....................... 123.225 MHz.......................... J MA, FAT ....................... 123.250 MHz.......................... J MA, FAT ....................... 123.275 MHz.......................... J MA, FAT ....................... 123.300 MHz.......................... K MA, FAS ....................... 123.325 MHz.......................... J MA, FAT ....................... 123.350 MHz.......................... J MA, FAT ....................... 123.375 MHz.......................... J MA, FAT ....................... 123.400 MHz.......................... J MA, FAT Itinerant. 123.425 MHz.......................... J MA, FAT ....................... 123.450 MHz.......................... J MA, FAT ....................... 123.475 MHz.......................... J MA, FAT ....................... 123.500 MHz.......................... K MA, FAS ....................... 123.525 MHz.......................... J MA, FAT ....................... 123.550 MHz.......................... J MA, FAT ....................... 123.575 MHz.......................... J MA, FAT Itinerant. 123.6-128.8 MHz...................... O MA, FAC, FAW, GCO, RCO, 25 kHz channel spacing. RPC 128.825-132.000 MHz.................. I MA, FAE Domestic VHF; 25 kHz channel spacing. 132.025-135.975 MHz.................. O MA, FAC, FAW, GCO, RCO, 25 kHz channel spacing. RPC 136.000-136.400 MHz.................. O, S MA, FAC, FAW, GCO, RCO, Air traffic control RPC operations; 25 kHz channel spacing. 136.425 MHz.......................... O, S MA, FAC, FAW, GCO, RCO, Air traffic control RPC operations. 136.450 MHz.......................... O, S MA, FAC, FAW, GCO, RCO, Air traffic control RPC operations. 136.475 MHz.......................... O, S MA, FAC, FAW, GCO, RCO, Air traffic control RPC operations. 136.500-136.875 MHz.................. I MA, FAE Domestic VHF; 25 kHz channel spacing. 136.900 MHz.......................... I MA, FAE International and domestic VHF. 136.925 MHz.......................... I MA, FAE International and domestic VHF. 136.950 MHz.......................... I MA, FAE International and domestic VHF. 136.975 MHz.......................... I MA, FAE International and domestic VHF. 143.750 MHz.......................... ...................... ........................ [Reserved] 143.900 MHz.......................... ...................... ........................ [Reserved] 148.150 MHz.......................... ...................... ........................ [Reserved] 156.300 MHz.......................... F MA For communications with ship stations under specific conditions. 156.375 MHz.......................... F MA For communications with ship stations under specific conditions; Not authorized in New Oreleans vessel traffic service area. 156.400 MHz.......................... F MA For communications with ship stations under specific conditions. 156.425 MHz.......................... F MA For communications with ship stations under specific conditions. [[Page 208]] 156.450 MHz.......................... F MA For communications with ship stations under specific conditions. 156.625 MHz.......................... F MA For communications with ship stations under specific conditions. 156.800 MHz.......................... F MA Distress, safety and calling frequency; For communications with ship stations under specific conditions. 156.900 MHz.......................... F MA For communications with ship stations under specific conditions. 157.425 MHz.......................... F MA For communications with commercial fishing vessels under specific conditions except in Great Lakes and St. Lawrence Seaway areas. 243.000 MHz.......................... F MA Emergency and distress frequency for use of survival craft and emergency locator transmitters. 328.600-335.400 MHz.................. Q RLG ILS glide path. 334.550 MHz.......................... Q RLT ....................... 334.700 MHz.......................... Q RLT ....................... 406.0-406.1 MHz...................... F, G, H, I, J, K, M, O MA, FAU, FAE, FAT, FAS, Emergency and distress. FAC, FAM, FAP 960-1215 MHz......................... F, Q MA, RL, RNV Electronic aids to air navigation. 978.000 MHz.......................... Q RLT ....................... 979.000 MHz.......................... Q RLT ....................... 1030.000 MHz......................... Q RLT ....................... 1104.000 MHz......................... Q RLT ....................... 979.000 MHz.......................... Q RLT ....................... 1300-1350 MHz........................ F, Q MA, RLS Surveillance radars and transponders. 1435-1535 MHz........................ F, J MA, FAT Aeronautical telemetry and telecommand operations. 1559-1610 MHz........................ Q DGP Differential GPS. 1559-1626.5 MHz...................... F, Q MA, RL Aeronautical radionavigation. 1646.5-1660.5 MHz.................... F TJ Aeronautical Mobile- Satellite (R). 2310-2395 MHz........................ J MA,FAT Aeronautical telemetry and telecommand operations. 2700-2900 MHz........................ Q RLS, RLD Airport surveillance and weather radar. 4200-4400 MHz........................ F MA Radio altimeters. 5000-5250 MHz\1\..................... Q MA, RLW Microwave landing system. 5031.000 MHz......................... Q RLT ....................... 5350-5470 MHz........................ F MA Airborne radars and associated airborne beacons. 8750-8850 MHz........................ F MA Airborne doppler radar. 9000-9200 MHz........................ Q RLS, RLD Land-based radar. 9300-9500 MHz........................ F, Q MA Airborne radars and associated airborne beacons. 13250-13400 MHz...................... F MA Airborne doppler radar. 14000-14400 MHz...................... F, Q MA, RL Aeronautical radionavigation. 15400-15700 MHz\2\................... Q RL Aeronautical radionavigation. 24750-25050 MHz...................... F, Q MA, RL Aeronautical radionavigation. 32300-33400 MHz...................... F, Q MA, RL Aeronautical radionavigation ---------------------------------------------------------------------------------------------------------------- \1\ See 47 CFR 2.106, footnotes S5.444A and US344, for conditions that apply to this band. \2\ See 47 CFR 2.106, footnotes S5.511C and US359, for conditions that apply to this band. [53 FR 28940, Aug. 1, 1988, as amended at 54 FR 11721, Mar. 22, 1989; 55 FR 7333, Mar. 1, 1990; 55 FR 28628, July 12, 1990; 56 FR 21083, May 7, 1991; 56 FR 51656, Oct. 15, 1991; 57 FR 45750, Oct. 5, 1992; 58 FR 30127, May 26, 1993; 64 FR 27475, May 20, 1999; 65 FR 59357, Oct. 5, 2000; 65 FR 60112, Oct. 10, 2000; 66 FR 26799, May 15, 2001; 67 FR 17300, Apr. 10, 2002; 67 FR 41858, June 20, 2002; 69 FR 32882, June 14, 2004; 69 FR 77950, Dec. 29, 2004]