For yards in C-1 districts:
A. All buildings and structures, except required walls, shall be set back not less than forty feet (40') from all property lines abutting a public street, and not less than twenty five feet (25') from all other property lines.
B. Yard setbacks for existing substandard C-1 lots shall be the same as the abutting residential district. (Ord. 1000 § 23.30(G), 1955)