Chapter 261, Laws of 1945, as amended by Chapter 145, Laws of 1949, Chapter 103, Laws of 1951 and Chapter 253, Laws of 1953 (Chapter 41.24 RCW), being the Volunteer Firemen’s Relief and Pension Act of the state, is adopted, including all its provisions, and by reference is made a part of this article as though fully set out in this article. (1957 code § 1.24.020.)