|| The legislature shall enact a workmen's compensation law applicable to workmen engaged in manual or mechanical labor in all public employment whether of the state, or any political subdivision or municipality thereof as may be defined by law and in such private employments as the legislature may prescribe by which compensation shall be required to be paid to any such workman, in case of his injury and to his dependents, as defined by law, in case of his death, by his employer, if in the course of such employment personal injury to or death of any such workman from any accident arising out of and in the course of, such employment, is caused in whole, or in part, or is contributed to, by a necessary risk or danger of such employment, or a necessary risk or danger inherent in the nature thereof, or by failure of such employer, or any of his or its agents or employee or employees to exercise due care, or to comply with any law affecting such employment; provided that it shall be optional with any employee engaged in any such private employment to settle for such compensation, or to retain the right to sue said employer or any person employed by said employer, acting in the scope of his employment, as provided by this Constitution; and, provided further, in order to assure and make certain a just and humane compensation law in the state of Arizona, for the relief and protection of such workmen, their widows, children or dependents, as defined by law, from the burdensome, expensive and litigious remedies for injuries to or death of such workmen, now existing in the state of Arizona, and producing uncertain and unequal compensation therefore, such employee, engaged in such private employment, may exercise the option to settle for compensation by failing to reject the provisions of such workmen's compensation law prior to the injury, except that if the injury is the result of an act done by the employer or a person employed by the employer knowingly and purposely with the direct object of injuring another, and the act indicates a wilful disregard of the life, limb or bodily safety of employees, then such employee may, after the injury, exercise the option to accept compensation or to retain the right to sue the person who injured him.
The percentages and amounts of compensation provided in house bill no. 227 enacted by the seventh legislature of the state of Arizona, shall never be reduced nor any industry
included within the provision of said house bill no. 227 eliminated except by initiated or referred measure as provided by this Constitution.