Except as changed or necessarily implied with reference to refunding, all provisions of the Institution Bond Act apply to the authorization and issuance of refunding bonds, including their terms and security, the bond resolution, taxes, the method of bond payment and other provisions. The determination of the governing board of the institution issuing the refunding bonds that the provisions of the Institution Bond Act have been complied with is conclusive in the absence of fraud or arbitrary and gross abuse of discretion.