; and (2) in subsection (e)(1), by adding at the end the following new sentence: For purposes of subsection (d), the term military installation includes an installation of the Coast Guard under the jurisdiction of the Department of Homeland Security. . 2815. Modification of pilot program on increased use of sustainable building materials in military construction Section 2861 of the National Defense Authorization Act for Fiscal Year 2022 ( Public Law 117–81 ; 10 U.S.C. 2802 note) is amended— (1) in subsection (b)(1), by striking the period at the end and inserting “to include, under the pilot program as a whole, at a minimum— (A) one project for mass timber; and (B) one project for low carbon concrete. ; (2) in subsection (d), by striking September 30, 2024 and inserting September 30, 2025 ; (3) by redesignating subsections (e) and (f) as subsections (f) and (g), respectively; (4) by inserting after subsection (d) the following new subsection (e): (e) Commencement of construction Each military construction project carried out under the pilot program must commence construction by not later than January 1, 2025.