Any harbor improvement district organized and existing pursuant to Part 2 (commencing with Section 5800) of Division 8 may improve, develop, protect, and maintain any or all harbors within its boundaries in accordance with the procedure, and in the manner provided, in this chapter and in the Public Contract Code, except that nothing in this chapter or in the Public Contract Code affects state-owned tidelands and submerged lands or the jurisdiction of the State Lands Commission over tidelands and submerged lands.