The Agency is designated as the air pollution control agency for the State. The Secretary or the Secretary's duly authorized representative, within the Agency, shall perform the functions vested in the Agency, as specified in the following sections of this chapter. (Added 1967, No. 310 (Adj. Sess.), § 3; amended 1971, No. 212 (Adj. Sess.), § 2; 1979, No. 195 (Adj. Sess.), § 2, eff. May 6, 1980; 2003, No. 115 (Adj. Sess.), § 12, eff. Jan. 31, 2005.)