(Amended by Ordinance No. 176955, effective October 9, 2002.)  The Bureau of Development Services shall not issue a plumbing permit to any plumbing contractor, or any sewer contractor, to install, construct, alter, or repair any plumbing or drainage system in the City, as defined and covered in this Title, unless such plumbing contractor or sewer contractor has been registered by the State of Oregon under the provisions of ORS 447.000 and unless his registration number has been filed with the Plumbing Division having jurisdiction.  A journeyman plumber or plumber apprentice shall show his Oregon State certificate of competency or registration card on the request of an Inspector of the Plumbing Division, or other authorized person.