Strippers in San Antonio to wear permits

New regulation requiring "strippers to wear their permists while they are on stage":

City Councilman Chip Haass pushed the measure, adopted unanimously by the 11-member council, as a way to make it easier for police to identify dancers.

Maybe I'm missing something here, but is it really that hard to figure out who the strippers are? Just look for the chicks with little or no clothes on!