State planning and development districts designated under this article and regional planning commissions established pursuant to this article shall, to the extent possible, be used as the basis for: (1) State planning and programming; (2) Proposing or designating areas for the purposes of administering programs which receive aid under federal acts which require districts; and (3) Performing areawide planning including review and comment on projects, coordination, and informational services for state and federal grant-in-aid programs. (Acts 1969, No. 1126, p. 2084, §7.)