"Collocation" means the mounting or installation of transmission equipment on an eligible support structure for the purpose of transmitting and/or receiving radio frequency signals for communications purposes. (Added by Amended Ord. 05-038, Nov. 30, 2005, Eff date Dec. 16, 2005; Amended by Amended Ord. 12-018, May 2, 2012, Eff date May 21, 2012; Amended by Ord. 18-011, Mar. 21, 2018, Eff date May 20, 2018. Formerly 30.91C.131).