Under the new policy, if an authorizing official does not approve an authorization within 72 hours of departure, or if the tickets are not paid for with a government travel charge card, the airline reservation will be cancelled. This applies to all City Pair and non-contract government flights that are booked through DTS or through a commercial travel office. - Under the new policy, if an authorizing official does not approve an authorization within 72 hours of departure, or if the tickets are not paid for with a government travel charge card, the airline reservation will be cancelled. This applies to all City Pair and non-contract government flights that are booked through DTS or through a commercial travel office.