In a Single-Family Residential District, no land or building shall be used or changed in use and no building shall be located, erected, or structurally altered unless otherwise provided herein, except for one or more of the following:
(a) Single-family dwellings.
(b) Accessory buildings incidental to the principal use which does not include any activity conducted as a business.
(c) Public schools.
(d) All other uses permitted in accordance with State and Federal laws.