The system of UC RUSAL’s requirements to suppliers of raw materials and base materials for the production of the key products and the procedures is established in the following documents:  the Uniform UC RUSAL Requirements for Suppliers;  Raw Materials Procurement Regulations;  Regulations for Supplier Certification;  Procedure for Supplier Audits;  Regulations for Supplier Accreditation;  Methods of Supplier Rating;  Methods of Accounting the Raw Materials with Deviations from Regulatory Requirements (in the process of revision).