Final answer:
The time threshold for DTS auto-canceling reservations if the authorization is not signed is not specified, but similar policies exist in online booking systems.
Step-by-step explanation:
The time threshold for DTS to auto-cancel reservations if the authorization has not been stamped SIGNED is not specified in the provided information. However, this process of canceling reservations if the authorization is not signed within a certain time limit is commonly found in online booking systems.
For example, some online travel platforms may automatically cancel hotel reservations if the payment is not completed within a specific time frame, typically ranging from a few hours to a day. Similarly, airlines may have their own policies regarding the time limit for signing authorization for flight reservations before they are automatically canceled. It's important to check the specific terms and conditions of the DTS or the airline to know the exact time threshold.