Depends how creative you want to get, you could cite the following as a chain of reasoning:
NFPA 25
3.3.19 Inspection, Testing, and Maintenance Service. A service program provided by a qualified contractor or qualified property owner’s representative in which all components unique to the property’s systems are inspected and tested at the required times and necessary maintenance is provided. This program includes logging and retention of relevant records.
3.3.28 Qualified. QUALIFIED means a design professional or a person having successfully completed a course of instruction related to the equipment being installed, serviced, or repaired. Such instruction shall be provided by the manufacturer of the equipment or their authorized representative.
4.1.1.1.1* Inspection, testing, maintenance, and impairment shall be implemented in accordance with procedures meeting those established in this document and in accordance with the manufacturer’s instructions.
4.1.1.2 These tasks shall be performed by a qualified person.
4.1.4.1 The property owner or designated representative shall correct or repair deficiencies or impairments that are found during the inspection, test, and maintenance required by this standard.
4.1.4.2* Corrections and repairs shall be performed by qualified maintenance personnel or a qualified contractor.
4.5.4 During testing and maintenance, water supplies, including fire pumps, shall remain in service unless under constant attendance by qualified personnel or unless impairment procedures in Chapter 15 are followed.
4.7* Maintenance. Maintenance shall be performed to keep the system equipment operable or to make repairs.
4.3.1* Records shall be made for all inspections, tests, and maintenance of the system and its components and shall be made available to the authority having jurisdiction upon request.
4.3.2 Records shall indicate the procedure performed (e.g., inspection, test, or maintenance), the organization that per- formed the work, the results, and the date.