Bill 28 imposed a contract on 55,000 CUPE education workers and banned their strike, with fines up to $500,000/day on the union (CBC). Repealed after a walkout.
Sources: Ontario government repeals anti-strike law for CUPE education workers - CBC (2022-11-14), Ford's use of the notwithstanding clause united Canada's largest unions - Globe and Mail (Nov 2022)