An authority may exercise all or any part or combination of the powers granted in Sections 34359 to 34364, inclusive, and make covenants other than the covenants expressly authorized in such sections, of like or different character. An authority may make covenants and do any and all acts and things necessary, convenient, or desirable to secure its bonds, or which will tend to make them more marketable notwithstanding that such covenants, acts, or things are not enumerated in this chapter.