"Farm building cluster" means that sub-area of a farm site that has the farmhouse and the majority of the agricultural structures located on it, with the structures being located within close functional proximity to each other. (Added by Amended Ord. 04-074, July 28, 2004, Eff date Aug. 23, 2004; Amended by Ord. 21-001, Feb. 24, 2021, Eff date Mar. 7, 2021).