The following rules shall apply to all uses in this District, except that legal nonconforming uses may continue at the same performance level at which they operated before they became nonconforming in relation to this Zoning Ordinance:
(a) Outdoor uses and activities are permitted outside buildings, but all merchandise shall be removed at the close of business each day. No outside storage of merchandise, equipment or fixtures is allowed.
(b) There shall be no noise carrying beyond a lot upon which a business is located, except for normal car and pedestrian activity.
(c) No business shall remain open to the public later than 11:00 p.m., or open before 5:00 a.m., local time.