(1) Development pursuant to a shoreline substantial development permit, shoreline variance, or conditional use shall not begin and shall not be authorized until 21 days after the “date of filing” or until all review proceedings before the Shoreline Hearings Board have terminated.

(2) “Date of filing” of a substantial development permit is the date of actual receipt of the decision by the Department of Ecology. The “date of filing” for a shoreline variance or shoreline conditional use permit shall mean the date the permit decision rendered by the Department of Ecology is transmitted by the Department of Ecology to the County and the applicant/proponent.