As used in this section, subsection (a) of section 17a-476, sections 17a-478 to 17a-480, inclusive, and section 17a-483, unless the context otherwise requires: “Catchment area” means any geographical area within the state established as such by the Commissioner of Mental Health and Addiction Services, the boundaries of which may be redesignated by said commissioner when deemed necessary to equalize the population of each area and in such manner as is consistent with the boundaries of the municipalities therein, provided such boundaries of any catchment area shall be entirely within the boundaries of a mental health region established under section 17a-478; “council” means the catchment area council established under section 17a-483; “regional behavioral health action organization” means the organization established pursuant to section 17a-484f; and “provider” means any person who receives income from private practice or any public or private agency which delivers mental health services.