This document provides a side-by-side comparison of the HACCP prerequisite programs established by four major food safety organizations: the USDA FSIS, FDA, NACMCF, and CODEX. It outlines the key sanitation requirements and procedures that each organization states should be in place prior to implementing a HACCP plan. These include facilities and equipment cleaning and maintenance standards, employee hygiene rules, pest control measures, and record keeping of prerequisite program monitoring and corrections. The document emphasizes that prerequisite programs provide the basic food safety conditions necessary for HACCP plans to be effective in preventing foodborne hazards.