The issuance and sale of bonds of the State of California in the sum of sixty million dollars ($60,000,000) and the use and disposition of the proceeds of the sale of said bonds, all as provided in the Harbor Development Bond Law of 1958 authorizing the issuance and sale of bonds for the purpose of providing funds for the construction, improvement, and development of harbors in this state, is hereby authorized and directed, and the Harbor Development Bond Law of 1958 is hereby approved, adopted, legalized, validated and made fully and completely effective. Nothing in this Constitution shall invalidate or restrict the provisions of this section, nor shall this section prevent amendments to the Harbor Development Bond Law of 1958 which are germane to the subject thereof; provided, such amendments do not increase the sum of the bonds herein authorized to be issued and sold nor utilize the proceeds thereof for purposes not related to the purposes generally described therein.