The regional planning commission shall have primary responsibility for those broad plans described in section 30-28-106(3) and surveys and studies described in section 30-28-107 which clearly affect the physical development of two or more governmental units. The district, county, or municipal planning commission shall have primary responsibility for all other plans, surveys, and studies and implementation thereof in zoning, subdivision, housing, recreation, transportation, public works, health and safety, and other similar subjects.
C.R.S. § 30-28-131