UAP is no longer a reputational curiosity for the aerospace and defense sector. Since FY2022, Congress has enacted statutory provisions that directly target defense contractor activities which create compliance, disclosure, and valuation risks that exist independently of whether any contractor actually possesses anomalous material. The legislative architecture is the exposure. This primer maps that architecture for professionals encountering UAP as a business variable for the first time.

"The legacy program" is shorthand for a claim that has reshaped U.S. defense policy over the past four years: that the United States government, operating through defense contractors and highly compartmented special access programs, has for decades been recovering, storing, and attempting to reverse-engineer material of non-human origin. For Blackgrove's readers, the question is not whether alien technology sits in a vault. The question is what the institutional response to that claim means for defense governance, contractor compliance, and the integrity of classified program oversight.