By law do you have to get liability insurance for a wedding?

No. But if you have wedding insurance public liabilitycoverage may be included. The extent of coverage is deefined by the terms and conditions of the policy. Further, if someone is injured as a result of a negligent act by the owner of the facility where the weddinhg is held, his/her/its liability insurance would probably come into play. That is one of the areas of inquiry that should be made when you are choosing a venue for a wedding.