(a) All that area south and west of a line commencing at the junction of the Wheatfield-Pendleton town line and the Niagara-Erie county line (Tonawanda Creek); thence northerly along the town line to Loveland Road; thence westerly along Loveland Road to Route 425 (Shawnee Road); thence northerly along Route 425 to Mapleton Road; thence westerly along Mapleton Road to Lockport Road; thence westerly along Lockport Road to Route 429 (Hoover Road); thence northerly along Hoover Road to the Wheatfield-Lewiston town line; thence westerly along the town line to the Niagara-Lewiston town line; thence westerly along the town line to Garlow Road; thence northerly along Garlow Road to the Tuscarora Indian Reservation boundary; thence clockwise along the reservation boundary to Route 104 (Ridge Road); thence westerly along Ridge Road to the Lewiston village line; thence counterclockwise along the Lewiston village line to the Niagara River; except those areas delineated as Level IV.

(b) All that area bounded by a line commencing at the intersection of Lockport-Pendleton town line and Transit Road (Route 78); thence northerly along Transit Road to Hamm Road; thence easterly along Hamm Road to Locust Street; thence northerly along Locust Street to Washburn Street; thence northerly along Washburn Street to East Avenue; thence northeasterly along East Avenue to Mill Street; thence northwesterly along Mill Street to VanBuren Street; thence northeasterly along VanBuren Street to Lake Avenue; thence northerly along Lake Avenue to Old Niagara Road; thence westerly along Old Niagara Road to Leete Road; thence westerly and southwesterly along Leete Road to Lower Mountain Road; thence westerly along Lower Mountain Road to the Lockport-Cambria town line; thence counterclockwise along the Lockport town line to the point of beginning; except that area delineated as Level IV.