The planning commission shall propose to the council the comprehensive plan as a whole by a single resolution, or, as the work of making the whole comprehensive plan progresses, may from time to time propose a part or parts thereof, any such part to correspond generally with one or more of the functional subdivisions of the subject matter of the plan. Source: SL 1949, ch 198 , § 7; SDC Supp 1960, § 45.3307; SL 1966, ch 145 ; SL 1975, ch 116 , § 9.