The amount of all benefits payable under the provisions of RCW
41.16.080,
41.16.120,
41.16.130,
41.16.140 and
41.16.230 shall be increased annually as hereafter in this section provided. The local pension board shall meet subsequent to March 31st but prior to June 30th of each year for the purposes of adjusting benefit allowances payable pursuant to the aforementioned sections. The local board shall determine the increase in the consumer price index between January 1st and December 31st of the previous year and increase in dollar amount the benefits payable subsequent to July 1st of the year in which said board makes such determination by a dollar amount proportionate to the increase in the consumer price index: PROVIDED, That regardless of the change in the consumer price index, such increase shall be at least two percent each year such adjustment is made.
Each year effective with the July payment all benefits specified herein, shall be increased by this section. This benefit increase shall be paid monthly as part of the regular pension payment and shall be cumulative. The increased benefits authorized by this section shall not affect any benefit payable under the provisions of chapter
41.16 RCW in which the benefit payment is attached to a current salary of the rank held at time of retirement. A beneficiary of benefit increases provided for pursuant to this section is hereby authorized to appeal a decision on such increases or the failure of the local pension board to order such increased benefits or the amount of such benefits to the Washington law enforcement officers' and firefighters' system retirement board provided for in *RCW
41.26.050.
For the purpose of this section the term "consumer price index" shall mean, for any calendar year, the consumer price index for the Seattle, Washington area as compiled by the bureau of labor statistics of the United States department of labor.