Toronto Fire Services took the lead after some deadly furniture fires caused loss of life due to the toxic smoke that was released very quickly in some common multi-residential spaces and pushed for the most stringent testing there is. Other municipalities have their requirements of flame spread as well. Often when one municipality takes the lead, others will follow. As of today only Toronto has the requirement for CAL TB-133 however some inspectors in other jurisdictions have requested it and if so then the building needs to comply.

Ontario’s fire code will sometimes be the standard, which says the fabric must have a reduced flame spread rate that passes either ULC-S103 or CAL TB-117.