Two or more counties, cities, or counties and cities may create a regional planning and economic development commission by adopting identical concurrent resolutions to that effect. Such a commission has the powers granted by this Article and the powers granted by Chapter 158, Article 2. If such a commission is created, it shall maintain separate books of account for appropriations and expenditures made pursuant to this Article and for appropriations and expenditures made pursuant to Chapter 158, Article 2. (1961, c. 722, s. 3; 1973, c. 822, s. 1; 2013-360, s. 15.28(e); 2013-363, s. 5.7(b).)