"Existing boiler and pressure vessel installation" as used in RSA 157-A: 5 means any boiler or pressure vessel constructed, installed, placed in operation or contracted for before 1967.
N.H. Admin. Code § Lab 1201.01
(See Revision Note at chapter heading for Lab 1200) #5371, eff 4-10-92, EXPIRED: 4-10-98
New. #7210, eff 2-28-00; ss by #9076, eff 1-24-08