This instruction provides guidance to Occupational Safety and Health Administration (OSHA) national, regional, and AOs, and state programs which choose to implement a similar program concerning OSHA's policy and procedures for implementing an NEP to reduce or eliminate workplace hazards associated with the catastrophic release of highly hazardous chemicals at petroleum refineries. This instruction cancels CPL 03-00-004 - Petroleum Refinery Process Safety Management National Emphasis Program. Other than minor editing changes, the only change transmitted in this instruction is to extend the time for completing inspections under the former NEP for two of OSHA's Regions - Region VI and Region VIII.