All employees are hereby further notified that in the event they do not specifically reject the provisions of the said compulsory law, they are deemed by the laws of Arizona to have accepted the provisions of said law and to have elected to accept compensation under the terms thereof; and that under the terms thereof employees have the right to reject the same by written notice thereof prior to any injury sustained, and that the blanks and forms for such notice are available to all employees at the office of this employer. 

See attached poster for details.