total annual emissions. After allowances for a unit subject to the emissions limitation requirements of this subsection which commenced commercial operation on or after in the case of any unit operated by a utility that furnishes electricity, electric energy, steam, and natural gas within an area consisting of a city and 1 contiguous county, and in the case of any unit owned by a State authority, the output of which unit is furnished within that same area consisting of a city and 1 contiguous county, the Administrator shall allocate for each unit in the utility its pro rata share of 7,000 allowances and for each unit in the State authority its pro rata share of 2,000 allowances. that the owner or operator of a unit listed on Table B may elect an allocation of allowances under another paragraph of this subsection in lieu of an allocation under this paragraph. of the Powerplant and Industrial Fuel Use Act of 1978 ( repealed 1987) to exceed an annual sulfur dioxide tonnage emissions limitation equal to the product of the unit’s annual fuel consumption, on a Btu basis, at a 65 percent capacity factor multiplied by the lesser of 1.20 lbs/mmBtu or the unit’s allowable 1987 sulfur dioxide emissions rate, divided by 2,000, unless the owner or operator of such unit has obtained allowances equal to its actual emissions. Unless the Administrator has approved a designation of such facility under that clause (iii)  of such definition in section 7651