Ah yes, AHJs. You cannot live with them and you most definitely cannot live without them. The official NFPA definition of an Authority Having Jurisdiction (AHJ) is “An organization, office or individual responsible for enforcing the requirements of a code or standard, or for approving equipment, materials, an installation or a procedure.”
The National Fire Protection Association Standards Council issued the 2019 edition of NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, with an effective date of May 24, 2018.
NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, is effective as of Sept. 3, 2018. NFPA 13R. Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies, is effective as of May 24, 2018.