Document #5186, effective 7-23-91, made extensive changes to the wording, format, and structure of rules in Chapter Wt 300. Document #5186 superseded all prior filings for the sections in this chapter. The prior filings for rules in the former Chapter Wt 300 included the following documents:

#2271, eff 1-10-83

#4297, eff 7-23-87

#2924, eff 12-11-84

#4352, eff 1-4-88

#3074, eff 7-26-85

#5028, eff 12-20-90

See Revision Note #1 at the chapter heading for Chapter Env-Wt 600 relative to the deletion of former rules under Chapter Wt 600 by Document #5185, effective 7-23-91, and the incorporation of those former rules into Chapter Wt 300 by Document #5186.