155.20   GROUND SIGNS.
All ground signs subject to sign regulations shall meet the following requirements:
   1.   It is unlawful to erect or permit any ground sign of a height greater than 50 feet. An off-premises ground sign shall maintain a minimum clearance of 10 feet measured from the ground level at the base of the sign to the bottom of the sign face.
   2.   Off-premises ground signs will be permitted to have a maximum of 300 square feet of sign surface on a side.
   3.   No ground sign shall be erected or permitted nearer the street than the right-of-way property line; provided however, such placement is not in conflict with special building line setbacks as established from time to time by the Council.
   4.   The minimum distance between on premises ground signs on any one business location shall be 50 feet.
   5.   All letters, figures, characters or representations in cut out or irregular form maintained in conjunction with or attached to or superimposed upon any ground sign shall be safely and securely built or attached to the sign structure.
   6.   The premises surrounding all ground signs shall be maintained by the owner thereof in a sanitary and uncluttered condition, free and clear of all obnoxious substances, rubbish, litter and weeds.