At a regular or special meeting called for the purpose of issuing revenue bonds as authorized pursuant to the Special Hospital District Act, the board of trustees may adopt a resolution that:
A. declares the necessity for issuing revenue bonds;
B. authorizes the issuance of revenue bonds by an affirmative vote of a majority of all the members of the board of trustees of the special hospital district; or
C. designates the source of the pledge [pledged] revenues.