Revenue bonds may be issued without any other proceedings or the happening of any other conditions or things than those proceedings, conditions, and things which are specified or required by this part. In the discretion of the authority, revenue bonds of a single issue may be issued for the purpose of paying the cost of any one or more, including a combination of, projects in any one city or in any one county or any number of counties. Any resolution providing for the issuance of revenue bonds under this part shall become effective immediately upon its passage and need not be published or posted. Any such resolution may be passed at any regular or special or adjourned meeting of the authority by a majority of its members.