This material is for training purposes only to inform the reader of occupational safety and health best practices and general compliance requirements and is not a substitute for provisions of the OSH Act of 1970 or any governmental regulatory agency. That's right...Here's the example: Old rule: You MUST wear ear protection in the warehouse. Wearing ear plugs is mandatory...it's a requirement. You will be disciplined if you don't wear ear plugs. New rule: You MAY wear ear protection in the warehouse. Wearing ear plugs is voluntary...it discretionary..it's encouraged. You can not be disciplined if you don't chose to wear ear plugs. Copyright © 2000-2008 Geigle Communications LLC . All rights reserved. Federal copyright law prohibits unauthorized reproduction by any means and imposes fines up to $25,000 for violations. disclaimer | Comment