Calgary’s mandatory mask bylaw kicked in, meaning you must wear a face-covering in indoor public spaces and on public vehicles in the city.The bylaw excludes places where there is an enrolment or membership requirement, such as schools and educational institutions, according to the city.“The rule of thumb is if the public does not have access to it, it will be exempt under the bylaw,” it said.Exemptions are in place for kids under two years old, people with underlying medical conditions and people who are unable to put on or remove a mask without help.The city said it will be giving out 500,000 free disposable face masks from the province starting Saturday.