"Curtailment" means "curtailment" as defined in the US EPA's proposed Model Open Market Trading Rule (60 FR 39668, August 3, 1995), namely, "a temporary or partial reduction in activity level (e.g., hours of operation and process rate)", excluding any "reduction in activity levels for a mobile source that occurs as a result of an activity reduction plan that is the subject of a USEPA emissions quantification protocol."
N.H. Admin. Code § Env-A 3102.10
#6441, EXEMPT, eff 1-21-97