The effective date of a change in pay due to personnel actions shall be as follows:
(A) Regular merit increases. July 1, or October 1 of the first year of employment if hired between April 1 and June 30 of that year, or such later date as a deferred increase is acted upon.
(B) Promotions, demotions and reinstatements. The date the personnel action is intended to take effect as indicated on the relevant personnel action form, or such later date as indicated by the City Manager.