641—23.4(105) Master license. A master licensed under Iowa Code chapter 105 will adhere to the following, the violation of which may give rise to disciplinary action:
	23.4(1) Contractor relationship. A master may only be a master of record for one contractor in any particular discipline at any one time, except that a contractor or a master may seek prior board approval to serve as the master of record for more than one contractor in a particular discipline. An individual who possesses master licenses in multiple disciplines may be a master of record for multiple contractors so long as the individual is only a master of record for one contractor in any particular discipline at one time.
	23.4(2) Contractor. A master will not knowingly perform work covered under Iowa Code chapter 105 for an unlicensed contractor.
	23.4(3) Supervision. A master who superintends the design, installation, or repair of plumbing, mechanical, HVAC-refrigeration, or hydronic systems will be available to supervise journeypersons or apprentices as needed and may only provide such supervision in the discipline or disciplines in which the master is licensed. A master will not knowingly supervise unlicensed persons who perform work covered under Iowa Code chapter 105 for which a board-issued license is required.
	23.4(4) Master of record. A master who serves as a master of record for a contractor and who disassociates from the contractor will notify the board and the contractor of the disassociation, if notice was not previously provided, within 30 days from the date of disassociation, absent exigent circumstances.
[ARC 7992C, IAB 5/15/24, effective 6/19/24]