In addition to other powers, any agency, commission or board provided for by joint powers agreement pursuant to Article 1 (commencing with Section 6500) of this chapter and created in a county of the third class as determined by Sec. 28020 may, by ordinance, authorize the issuance of revenue bonds pursuant to this article to pay the cost and expenses of acquiring or improving a regional public park or regional public recreation area and all facilities and improvements related thereto.