A county initiative meant to straighten out the estimated 500 short-term rentals not remitting Marin’s transit occupancy tax is being launched this week. Starting today, the county will mail notices to operators announcing a 30-day window to come into compliance. In exchange, county tax collector Roy Given is allowing those operators—who represent about half of all the short-term rental operators he estimates exist in Marin—to either pay the amount of back taxes they owe since…