Your agency may authorize/approve use of:
(a)
Taxicabs as specified in §§ 301-10.420 through 301-10.421 of this chapter;
(b)
Commercial rental automobiles as specified in §§ 301-10.450 through 301-10.453 of this chapter; or
(c)
Any other special conveyance when determined to be advantageous to the Government.