Philadelphia mayor Michael Nutter signed legislation requiring restaurants, bars and other private establishments to designate all single-occupancy restrooms as gender neutral.

The law would require all signage be non-gender specific by Jan. 20, 2016.

The Department of Licenses and Inspections will oversee the law’s enforcement. Businesses will have 90 days from the time of the laws implementation to make the change or face fines up to $2,000.

The law will not apply to restrooms which are considered multi-occupant or which contain multiple stalls.

The legislation was unanimously approved by the city council Oct. 8.

Other cities with similar laws include Washington, D.C., Austin, Seattle and New York City.