Certain NOMs require companies to obtain for their product(s) a certificate of compliance issued by an accredited certification body. In the case of products manufactured outside Mexico, this certificate must accompany the import documentation at the port of entry. | Certain NOMs require companies to obtain for their product(s) a certificate of compliance issued by an accredited certification body. In the case of products manufactured outside Mexico, this certificate must accompany the import documentation at the port of entry. |