Requires the department of retirement systems, in calculating average final compensation under RCW 41.40.010(17) for a member of plan 1, 2, or 3, to include any compensation forgone by the member during the 2009-2011 fiscal biennium as a result of reduced work hours, voluntary leave without pay, or temporary furloughs if the reduced compensation is an integral part of the employer's expenditure reduction efforts, as certified by the employer.