A secondary charge that can be filed against illegal rentals.
A bit like in the the past there was a tax stamp needed for marijuana just so when some one was caught there would be more charges that could be filed against them hence more leverage.
So be it with the modern scofflaws who denigrate our neighborhoods and stress our infrastructure all in the name of scamming a few extra $'s at the expense of the neighborhoods infrastructure, cohesion and quietitude.