If the authority desires, round trip transportation tickets for authorized travel may be purchased in advance by use of a properly prepared authority purchase order, an accounts payable voucher and a check payable to the common carrier in the exact amount, excluding any taxes for the specific travel authorized. This eliminates the need for the traveler to expend his own funds for transportation costs.
N.Y. Comp. Codes R. & Regs. Tit. 9 §§ 1625-4.5