The board may provide in the resolution authorizing the issue of any bonds under this chapter that any act consented to by the holders of 60 percent in aggregate principal amount of the outstanding bonds of any issue of bonds issued under this chapter, pursuant to provisions for such consents contained in any resolution of the board constituting a part of the proceedings for the issuance of such bonds, shall not, as to the bonds of that issue, be deemed an infringement of any of the provisions of Article 7 of this chapter, or of any covenant made pursuant thereto, whatever the character of such act may be.