State plan States, approved under section 18(b) of the Occupational
Safety and Health Act of 1970 (see list on page 36) must adopt
standards and enforce requirements which are at least as effective as
Federal requirements. There are currently 25 State plan States; 23
covering private and public (State and local government) sectors and
two covering public sector only. Plan States must adopt comparable
standards to the Federal within six months of a Federal standard’s
promulgation.