The Streamlining Military Infrastructure Act requires the Secretary of Defense to study whether the military can use intergovernmental support agreements to handle smaller construction projects more efficiently. Within 120 days of the bill's enactment, three assistant secretaries from the Army, Navy, and Air Force must submit a report to Congress evaluating this approach and assessing whether spending limits for certain types of projects can be raised to $18 million for laboratory work and $8 million for operations and maintenance projects. The report must also identify up to 10 specific military construction projects that could potentially use these agreements instead of traditional procurement processes. While the bill does not specify new funding amounts, it aims to streamline how the military manages minor construction projects by exploring whether working agreements with state and local governments could speed up infrastructure work. This legislation affects military departments and defense officials responsible for military construction and facility planning across the armed services.