New Orleans businesses covered by an upcoming ban on smoking in public places will be required to post vinyl, plastic or metal signs no smaller than 8.5 inches by 11 inches at the front door and at the entrances to all restrooms when the ban takes effect April 22, officials said.

Window stickers, no smaller than 4 inches by 6 inches, can be used in lieu of the larger signs.

The owners of affected businesses also must remove all ashtrays, give a verbal warning to anyone caught violating the ban and refuse service or evict someone who violates the warning.

The requirements are explained in a set of proposed regulations released Monday by the city’s Health Department. The regulations, which also detail how noncompliance with the new smoke-free ordinance can be reported, will be presented to the City Council for approval.

Businesses will be able to access a toolkit that includes signs and other information about the ban to give to employees and patrons later this week, Health Director Charlotte Parent said.