1705.17 PLUMBER'S LICENSE REQUIRED.
   (a)   Except as provided in Sections 1705.01, 1705.03 and 1705.14, all plumbing installations for which a permit is required shall be made only by or under the direct supervision of a licensed plumber, licensed under the provisions of this chapter.
   (b)   A permit authorizing a firm or corporation to install work for which a license is required shall be issued only to a licensed responsible member, officer or employee of such firm or corporation, on record as such with the Commissioner of Buildings.