Any section or part of any section in this chapter, insofar as it should conflict with former (1989) Charter Sections 399 through 444, as those sections existed on June 5, 1989, shall be superseded by the contents of said sections, except to the extent that the conflict occurs because of the enactment of Measure "M." It is expressly the intention of the city council in enacting this chapter to preserve the provisions of the Section 399 plan intact except as changes are required to conform to the intent and purpose of Measure "M." In the event that, in enacting this chapter, the city council has inadvertently omitted to make a required change or has made a change which either eliminated a provision which has continuing applicability, or changed wording which has the effect of changing a benefit, the city council shall have continuing authority to amend this article or any other provisions of this chapter to correct any such error. The retirement system manager shall preserve intact an exact copy of the provisions of former (1989) Charter Sections 399 through 444 for the purpose of future comparison and determinations under this section. In the event that any word, phrase, clause or section of these sections shall be adjudged unconstitutional, the remainder thereof shall remain in full force and effect. (Prior code § 34.06.643)