The governing authority of each county or municipality may, in order to more effectively carry out its requisite zoning and planning activities, utilize the services of any appropriate local or regional planning commission, and it may consider, act upon or otherwise make use of the suggestions, proposals or recommendations of any such appropriate local or regional planning commission. Also, in carrying out its zoning and planning duties, the governing authority of each county and municipality may utilize the services of any appropriate municipal or county engineering department or the services of an advisory committee of citizens of such number as may be deemed appropriate to recommend the boundaries of the various original districts and appropriate regulations to be enforced therein. A preliminary report may be made, and public hearings thereon before submitting its final report, may be had.