While the mayor’s Office of Special Enforcement is charged with implementing the law, it has been “nearly impossible” to do so, Kallos says, due to legal challenges.

That’s where his bill comes in.

By requiring renters to register with the city before offerings are advertised online, the city would be able to reject them in advance. Failure to comply would result in steep fines.

Kallos expects thousands of units to go off the short-term-rental market as a result — paving the way for hotels to start recouping losses from the pandemic.