in plumbing business -- Notice of connection. A company or individual principal may engage in the business of plumbing within any county of the Commonwealth if a person connected with that company or individual principal in responsible charge of the plumbing work is a licensed master plumber. Any master plumber, in responsible charge of plumbing work for a company or individual engaged in the plumbing business, shall notify the department at any time he or she commences or severs his or her connection with the company or individual principal. Effective:June 29, 2017