"Discrete emission reduction (DER)" means " 'discrete emission reduction' or 'DER' " as defined in RSA 125-O:2, V, namely, "an emission reduction generated over a discrete period of time, and measured in weight (e.g., tons)."
N.H. Admin. Code § Env-A 2902.19
#10002, eff 10-1-11 (from Env-A 2903.20)