NOTE: This is a controlled and restricted publication. The latest revision of this publication is with the Directorate of Airworthiness Standards (DAWS) of the NCAA. This Advisory Circular (AC) is issued for registration of suppliers/distributors of aircraft parts, components and materials used in maintenance. The AC provides for intending suppliers/distributors to join an accreditation programme. The AC also provides information that will guide aircraft owners, operators, and aircraft maintenance organisation in ensuring that their supplier evaluation procedures ensures that parts, components and materials are supplied for reliable sources to prevent incident of suspected unapproved parts.