All plumbing work shall be performed, or supervised and approved, by a licensed master plumber who is: Familiar with its design and purpose; and Available to direct and control all journey and apprentice plumbers. The license of a master plumber will be issued in the name of the master plumber. All plumbing work performed, or supervised and approved, by a licensed master plumber shall be of ordinary worker-like skill and quality and shall conform both to the regulations promulgated by the Board and to applicable local laws and regulations.