CFR›Title 15›Subtitle B›Chapter XV›Part 1500 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 1500—CONCRETE MASONRY RESEARCH, EDUCATION, AND PROMOTION Subparts A Subpart A—Concrete Masonry Products Research, Education, and Promotion Order Subject groups Concrete Masonry Products Board–Reports, Books, and Records B Subpart B—Referendum Procedures Sections 1500.100–1500.108 Authority15 U.S.C. 8701-8717.Source86 FR 23276, May 3, 2021, unless otherwise noted.