“Serial number” means, for CO2 allowances, the unique identification number assigned to each CO2 allowance by the regional organization under Env-A 4607.08(c).

Source. #9283, INTERIM, eff 10-1-08, EXPIRED: 3-30-09 New. #9444, eff 4-3-09; ss by #10468, eff 1-1-14 14 (from Env-A 4602.66); ss by #12967, eff 1-1-20 (from Env-A 4602.73)