The City Council may modify the fees established in Sections 16.54.050 and 16.54.060 annually by resolution if the assumptions utilized in calculating the fees have changed. The modifications adopted by resolution will not be based on a change in the method of calculating the fees. Absent action by the City Council to modify the fees by resolution, each April of each year the chief financial officer shall review the current Engineering News Record Construction Cost Index (ENRCCI) for the cities of Los Angeles and San Francisco, California. When the average of such indices differs from the average of the indices for the preceding April first, the factor of increase or decrease shall be applied to the fees established in Sections 16.54.050 and 16.54.060. (Ord. 2017-01 (part), 2017: Ord. 2005-09 § 2 (part), 2005)