Notwithstanding the legislative assembly's authority to propose amendments to this constitution under article IV, section 16 thereof, the legislative assembly shall not have authority to propose an amendment to this constitution to alter or repeal the term limitations established in section 1 of this article. The authority to propose an amendment to this constitution to alter or repeal the term limitations established in section 1 of this article is reserved to initiative petition of the people under article III of this constitution.