On receipt of valid petitions, the Executive Director shall conduct a parking study within the area. In this subsection, “influence area” means the area surrounding a facility in which it could reasonably be expected that nonresident motor vehicle owners or operators using the facility would seek parking spaces. Additional areas may be included in the study to cover:adjacent areas of parking congestion; and influence areas of known parking congestion generators. City Code, 1976/83, art. 31, §156(c)(2)(1st par.) Ord. 79-999 Ord. 79-1193 Ord. 80-142 Ord. 83-1120 Ord. 85-483 Ord. 86-641 Ord. 91-703 Ord. 91-760 Ord. 92-109 Ord. 92-114 Ord. 92-115 Ord. 93-193 Ord. 99-519 Ord. 06-316 Ord. 13-092