If the report is approved by the board, the board may adopt a resolution declaring that the public interest and necessity demand the acquisition, construction or completion of the project or of a designated part thereof, the purpose, nature and extent of which shall be described in general terms, and authorizing such acquisition, construction or completion. The board may thereupon authorize the issuance of revenue bonds for the purpose of obtaining funds in an amount estimated by the board to be sufficient for such project or part thereof.