Provides that the parties to an allowed claim for worker’s compensation benefits may enter into a voluntary settlement agreement with respect to one or more allowed claims for benefits. All voluntary settlement agreements must be approved by the Board of Industrial Insurance Appeals. This act mandates that, in 2016, 2021, and 2026, the Department of Labor and Industries shall contract for an independent study of voluntary settlement agreements. The Department shall also contract with an independent entity to study the nature, incidence, and cost of occupational disease claims in the Washington workers' compensation system. A separate study shall be commissioned to examine return to work provisions. This act permits employers to offer light duty or transitional work to injured workers who are entitled to temporary total disability. (See also SB 5128).   Official Text and Analysis.