Prepare and recommend to units of government within the Commission's area of operation generalized comprehensive and functional plans and policies which are metropolitan or regional in character and which may include but need not be limited to plans for:
In the preparation of its comprehensive and functional plans, the Commission shall give consideration to all pertinent existing plans, projects, proposals, and policies of units of government charged with the carrying out of governmental services, public works, and regulations to which the Commission's plans will relate. The Commission shall refrain so far as practicable from duplication of work performed by the various units of government, and in the preparation of its comprehensive and functional plans and policies shall give primary attention to the need for correlating the various elements involved in orderly metropolitan and regional growth and development.
70 ILCS 1710/21