17.04.543 Setback line, front yard.
   "Front yard setback line" means the line which defines the depth of the required front yard. The setback line shall be parallel with the street line or the line established by the General Plan, setback ordinance or subdivision map and shall be removed therefrom by the perpendicular distance prescribed for the front yard in the zone.
(`78 Code, § 17.04.543.)