(a) Actual emissions means emissions to the ambient air, and include fugitive emissions if such emissions are considered in determining whether a source is a major air contamination source.

(b) Air contamination source means all sources required to obtain a permit, certificate or approval pursuant to article 19 of the Environmental Conservation Law.

(c) Consumer price index for any calendar year means the average of the consumer price index for all urban consumers, published by the U.S. Department of Labor as of the close of the 12-month period ending August 31st of each year.

(d) Major air contamination source has the same meaning given to it in section 19-0107(19) of the Environmental Conservation Law.

(e) Operating permit program means the program established in section 19-0311 of the Environmental Conservation Law.

(f) Permitted emissions means those emissions of regulated air contaminants that are authorized by permit.

(g) Potential to emit means the maximum capacity of a stationary source to emit any regulated air contaminant under its physical and operational design. Any physical or operational limitation on the capacity of such source to emit a regulated air contaminant, including air pollution control equipment and restrictions on the hours of operation or on the type or amount of material combusted, stored or processed, is treated as part of its design if the limitation is enforceable by the commissioner and the administrator of the United States Environmental Protection Agency.

(h) Regulated air contaminant means the following: