Cal. Pub. Res. Code § 30602

Prior to certification of its local coastal program, any action taken by a local government on a coastal development permit application may be appealed by the executive director of the commission, any person, including the applicant, or any two members of the commission to the commission. The action shall become final at the close of business on the 20th working day from the date of receipt of the notice required by subdivision (c) of Section 30620.5, unless an appeal is submitted within that time. Regardless of whether an appeal is submitted, the local government’s action shall become final if an appeal fee is imposed pursuant to subdivision (d) of Section 30620 and is not deposited with the commission within the time prescribed.