Nothing in this subchapter is intended to change or in any way conflict with the status, boundaries, or functions of regional or metropolitan planning commissions or councils of governments established under §§ 14-17-301 — 14-17-309 and 14-56-501 — 14-56-509 nor the status, boundaries, and functions of planning and development districts as established and recognized under §§ 14-166-201 — 14-166-205.