(A) The provisions of Chapter 17.70 shall apply.
(B) A wall or fence shall be constructed or erected and maintained along all interior lot lines of the lot side. The wall or fence shall be constructed of colored decorative block or slump stone or wood or wrought iron material or a composite of such material; provided, however, that portion of a wall or fence constituting wood shall not exceed 20% of the surface thereof.
(C) All portions of the lot site of a dwelling which is or which is required to be landscaped shall have constructed and installed therein a permanent water irrigation sprinkler system, and the system shall be maintained in an operable condition at all times.
(`78 Code, § 17.24.120.)