Maine — plumbing code & licensing

OPEN GATES: (1) Effective date of the 2021 UPC adoption not read firsthand from an official source in this lane (board rule is 02-395 CMR Ch. 4 per secondary sources; not opened). (2) Amendments: the maine.gov Fire Marshal page states adopted Maine amendments exist and must be viewed in conjunction with the 2021 UPC, but the amendments document itself was not opened, so amendments_url is blank. NOTE: a direct curl request to maine.gov/dps returned a CloudFront 403; the page was read via the browser fetch tool instead. Licensing classes read firsthand: Master, Journeyman, Trainee, Journeyman-in-Training. UPGRADE PASS 1 (2026-10-31): gates closed - the Plumbers' Examining Board page (https://www11.maine.gov/pfr/professionallicensing/node/428) read firsthand states '2021 UPC - Effective January 1, 2022' and that the new 02-395 CMR ch. 4 is effective January 1, 2022, incorporating the 2021 UPC subject to the exclusions and amendments set forth in the rule; the board's official Laws and Rules compilation (opened firsthand) contains ch. 4 'Installation Standards' with header 'Last Updated: January 1, 2022 (Chapter 4)' - the Maine amendments live inside ch. 4 itself, so amendments_url points to that compilation. code_effective_date filled as 2022-01-01. A secondary source claims a ch. 4 update effective March 6, 2024; not verified firsthand and not asserted. Status flipped to verified.