Chapter 296-307 WAC Safety standards for agriculture Part Y-1 Employer chemical hazard communication (WAC 296-307-550 through 296-307-55060) and Part Y-2 Material safety data sheets and label preparation (WAC 296-307-560 through 296-307-56050) have been repealed. Please refer to chapter 296-901 WAC Globally harmonized system for hazard communication.