Quebec has become the first Canadian province to make mask-wearing mandatory in all indoor public places for people aged 12 years and older.Premier Francois Legault said the new directive enters into effect Saturday - just in time for the province's annual construction holiday.Businesses will be expected to enforce the new rules and are subject to fines of between $400 and $6,000 if their customers are caught violating the health directive, Legault told reporters Monday in Montreal.He said the government is considering imposing fines on individuals beginning in August.