Property tax: other; locally adopted cap on a local unit's own authority to levy a property tax millage; prohibit. Amends 1893 PA 206 (MCL 211.1 - 211.155) by adding sec. 34f.

HB 4121 prohibits local governments (counties, cities, townships, villages) from adopting property tax caps that automatically reduce tax rates when revenue hits a fixed dollar limit. It voids any existing local tax cap with this automatic reduction feature and requires local units to disregard such caps. The bill specifically targets caps imposed by local charter, ordinance, or policy - not state-mandated limits - making them unenforceable. This change ensures local tax revenue limits cannot trigger automatic rate cuts based solely on annual dollar amounts.