All proceedings conducted pursuant to this chapter shall be commenced in the manner provided by the Charter, statute or ordinance governing the matter. In any proceeding involving the appeal of a decision of a city official, board or commission, the appeal procedure shall be commenced by the filing with the clerk involved of a written notice of appeal by any party entitled to take such appeal upon forms to be supplied by the administrative body having jurisdiction over the appeal within a period of thirty days from the date of the decision being appealed, unless a different time for appeal is set by the Charter, statute or other ordinance involved. (Prior code § 1-7-4)