County supervisors will soon decide how much to charge homeowners who apply for licenses under newly adopted short-term rental rules, which cap the number of S.T.R.s in West Marin for the first time. County staff are working on procedures for administering the regulations and will present a proposed license fee to supervisors at a meeting in June. S.T.R. operators are currently required to renew their business licenses annually with the county’s Department of Finance. Under…