For purposes of sections 67.628 to 67.636, the term:

(1) “City” means a constitutional charter city not within a county;

(2) “Commission” means the regional cultural and performing arts development commission created in section 67.629;

(3) “County” means a constitutional charter county adjoining a constitutional charter city not within a county;

(4) “District” means the regional cultural and performing arts development district created in section 67.627.