No person may discharge air contaminants into ambient air within a region in such manner as to violate ambient air quality standards established under this chapter or emission standards established pursuant to section 585, 585‑B or 585‑K. [PL 2007, c. 584, §2 (AMD).]
When the board, pursuant to section 590, has by rule provided that no person may operate or maintain within a region any air contamination source or emit any air contaminants without an emission license from the department, the operation or maintenance without that license is prohibited.