The plant-wide applicability limit (PAL) is the sum of the baseline actual emissions of the PAL pollutant for each existing facility at the source to be covered. The allowable emission rate may be used for facilities that did not exist in the baseline period. Baseline actual emissions from facilities that were permanently shut down after the baseline period must be subtracted from the baseline emissions rate.(1) An amount equal to the applicable significant level for the PAL pollutant may be added to the baseline actual emissions when establishing the PAL.(2) When establishing the PAL level for a PAL pollutant, only one consecutive 24-month period must be used to determine the baseline actual emissions for all existing facilities. However, a different consecutive 24-month period may be used for each different PAL pollutant.(3) The executive director shall specify a reduced PAL level(s) in the PAL permit, to become effective on the future compliance date(s) of any applicable federal or state regulatory requirement.