On behalf of the members of the National Stone, Sand & Gravel Association (NSSGA) and the National Ready Mixed Concrete Association (NRMCA), we strongly urge you to exclude Section 2815 of the Senate-passed NDAA from the conference report for FY24 National Defense Authorization Act (NDAA). This provision makes a controversial modification to an existing, ongoing pilot at DoD and does not have a similar provision in the House passed bill. Sec. 2815 of the Senate FY24 NDAA (S. 2226, pp. 1375-1376) amends a pilot program that was included in the FY22 NDAA (PL 117-81, Sec. 2861) to increase the use of sustainable building materials in military construction. This pilot program was a material neutral compromise after a material specific (mass timber only) pilot program was proposed (Joint Explanatory Statement to PL 117-81, p. 1255). The proposed changes in the FY24 Senate NDAA would add new material preference criteria and picks winners and loser in construction design and implementation.