[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR87.71]

[Page 203]
 
                       TITLE 47--TELECOMMUNICATION
 
                         COMMISSION (CONTINUED)
 
PART 87--AVIATION SERVICES--Table of Contents
 
            Subpart C--Operating Requirements and Procedures
 
Sec. 87.71  Frequency measurements.

    A licensed operator must measure the operating frequencies of all 
land-based transmitters at the following times:
    (a) When the transmitter is originally installed;
    (b) When any change or adjustment is made in the transmitter which 
may affect an operating frequency; or
    (c) When an operating frequency has shifted beyond tolerance.