Specifications include, but are not limited to: 1.Vendor shall be certified by the United States Drug Enforcement Agency (DEA). 2.Vendor shall be an accredited reference material producer that is accredited to ISO Guide 34:2009 or ISO/IEC 17034:2016 by an accrediting body that is a signatory to a mutual or multilateral recognition arrangement in an ILAC recognized regional accreditation cooperation or the ILAC Mutual Recognition Arrangement, with a scope of accreditation covering the certified reference material; or, 3.Must be a National Metrology Institute that is a signatory to the BIPM – CIPM Mutual Recognition Arrangement with the certified reference material listed in the BIPM key comparison database (KCDB); or, 4.Shall be accredited to ISO/IEC 17025:2005 or ISO/IEC 17025:2017 with a scope of accreditation that specifies Reference Material Certified Reference Material testing