Requires the National Guard Bureau to credit reimbursements it receives from a State, Puerto Rico, the District of Columbia, Guam, or the U.S. Virgin Islands back to the appropriation or account that paid the original expense (or a similar available account). It also limits Department of Defense use of those recovered funds so they may be spent only on repair, maintenance, replacement, or similar work on assets directly used by National Guard units while those units are serving on State active duty.