The C-documents contain the Rules of Certification including those for the approval of certification bodies and auditors, the frequency of audits, minimum audit time, assessment criteria, checklists, etc. There is also an explanation of how the supervision by certification bodies is implemented and of how GMP+ International supervises the certification process. These documents will be subject of a final check, and will be presented afterwards to the International Expert Committee for final approval. See the list of C-documents below.