A. If a municipality has a planning commission, the planning commission shall hold at least one public hearing on a specific plan or regulation prior to any hearing by the legislative body. Notice of the time and place of such hearing shall be given at least fifteen and not more than thirty calendar days before the hearing by:

1. Publication at least once in a newspaper of general circulation published or circulated in the municipality, or if there is none, by posting in at least ten public places in the municipality.

2. Such other manner in addition to publication as the municipality may deem necessary or desirable.

B. A copy of any specific plan, regulation or amendment together with the recommendation of the planning commission shall be submitted to the legislative body accompanied by a statement of the planning commission’s reasons for such recommendation.

C. Upon receipt of a copy of any proposed specific plan, regulation or amendment of such plan or regulation, the legislative body may by ordinance or resolution adopt the plan or regulation. Before adopting the proposed specific plan or regulation, the legislative body shall hold at least one public hearing. Notice of the time and place of such hearing shall be given in the time and manner provided for the giving of notice of the hearing by the planning commission as provided in subsection A. The specific plan or regulation, as adopted, shall be designated as a specific plan or regulation.

D. If the municipality does not have a planning commission, the only procedural steps required for the adoption of a specific plan, regulation or any amendment to a specific plan or regulation are those provided in this article for action by the legislative body.