Which document provides the authority for a provisional unit?

The G-Series order is the correct answer because it serves as the official documentation that establishes the authority for the creation or activation of a provisional unit within an organization. This type of order typically outlines the specific structure, mission, and operational parameters that govern the provisional unit, enabling it to operate effectively within the larger framework of military or organizational directives.

In particular, the G-Series order provides clear guidance on the temporary nature of the unit, its composition, and any special considerations that need to be addressed during its deployment. This authority is crucial for ensuring that the provisional unit adheres to established protocols while still being able to respond to immediate operational needs.

Other types of orders, such as administrative orders, operational directives, or general orders, focus on different aspects of governance and coordination and may not specifically confer the same level of authority for operational deployment or creation of units as the G-Series order does.