This bill significantly expands the Department of Defense's authority for intergovernmental support agreements (IGSAs) , enabling the Secretary concerned or state, local, or tribal governments to partner with other federal agencies for sharing installation-support services. It broadens the types of funds that can be used to pay for these services, including operation and maintenance , military construction , and non-appropriated funds , and clarifies that these agreements can encompass services for the repair, construction, maintenance, or operation of facilities. The legislation also extends the authorization for IGSAs by five years, moving the sunset date to September 30, 2030 . Furthermore, it establishes a pilot program allowing the Secretary of Defense to enter into one IGSA for each military department (Army, Navy, Air Force) for a term of up to 20 years , overriding previous term limitations to foster longer-term partnerships and community collaboration.