Before any contract is let or work is ordered or authorized for parking station improvements, except the survey and investigation authorized in Section 32-106 of this title, the governing body shall conduct a public hearing on the advisability of the improvement, as set forth in the resolution establishing the improvement district. Notice of the hearing shall be given by:

The notice by mail and by publication shall contain:

1. The time and place of the hearing;

2. The general nature of the proposed improvements;

3. The estimated or probable cost of the proposed improvements;

4. The extent of the proposed improvement district to be assessed;

5. The proposed method of assessment; and

6. The proposed apportionment of cost between the improvement district and the municipality.