No contract, expressed or implied, no rule, regulation or other device shall in any manner relieve any employer, in whole or in part, of any obligation created by this chapter, except as herein set forth.

(1949 Rev., S. 7455; 1958 Rev., S. 31-183; 1961, P.A. 491, S. 43.)

History: 1961 act entirely replaced previous provisions.