[Code of Federal Regulations] [Title 41, Volume 4] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR301-10.183] [Page 34-35] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 301--TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES PART 301-10_TRANSPORTATION EXPENSES--Table of Contents Subpart B_Common Carrier Transportation Sec. 301-10.183 What class of ship accommodations must I use? You must use the lowest first class accommodations when traveling by ship, except when your agency specifically authorizes/approves your use of first-class ship accommodations under paragraphs (a) through (c) of this section. (a) Lowest first class accommodations are not available on the ship. (b) When use of first-class is necessary to accommodate a disability or other special need. Disability must be substantiated in writing by competent medical authority. Special need must be substantiated in writing according to your agency's procedures. If you are [[Page 35]] authorized under Sec. 301-13.3(a) of this chapter to have an attendant accompany you, your agency also may authorize the attendant to use first-class accommodations if you require the attendant's services en route. (c) When exceptional security circumstances require first-class travel. Exceptional security circumstances include, but are not limited to: (1) The use of lowest first class accommodations would endanger your life or Government property; or (2) You are an agent on protective detail and you are accompanying an individual authorized to use first-class accommodations; or (3) You are a courier or control officer accompanying controlled pouches or packages. Local Transit System