§ 1953.3 General policies and procedures.

(a) Effectiveness of State plan changes under State law. Federal OSHA approval of a State plan under section 18(b) of the OSH Act in effect removes the barrier of Federal preemption, and permits the State to adopt and enforce State standards and other requirements regarding occupational safety or health issues regulated by OSHA. A State with an approved plan may modify or supplement the requirements contained in its plan, and may implement such requirements under State law, without prior approval of the plan change by Federal OSHA. Changes to approved State plans are subject to subsequent OSHA review. If OSHA finds reason to reject a State plan change, and this determination is upheld after an adjudicatory proceeding, the plan change would then be excluded from the State's Federally-approved plan.