Any specific plan may be amended by the same procedure as the specific plan (or portion thereof) is adopted. The city may initiate amendments to any portion of a specific plan. The following changes to a specific plan shall require a specific plan amendment:
(1) Changes to the text or maps other than the addition of information that does not change the effect of any regulation.
(2) Changes in any specific plan boundary.
(3) Increase or decrease in the specified density for any area.
(4) Changes in standards or regulations, including landscaping and design standards.
(Ord. 612 Exhibit A (part), 2008).