14 CFR 1204.1600: Issuance of motor vehicle for home-to-work.

When a NASA employee on temporary duty travel is authorized to travel by Government motor vehicle and the official authorizing the travel determines that there will be a significant savings in time, a Government motor vehicle may be issued at the close of the preceding working day and taken to the employee's residence prior to the commencement of official travel. Similarly, when a NASA employee is scheduled to return from temporary duty travel after the close of working hours and the official authorizing the travel determines that there will be a significant savings in time, the motor vehicle may be taken to the employee's residence and returned the next regular working day.