The NF mark certifies compliance of products with applicable national, European and international normative documents or with the conditions specified in normative documents referred to in certification reference systems.
For the development of the NF mark for construction products, AFNOR Certification commissioned the CSTB to perform all certification operations as a certification body, from the development of certification reference documents to the issuance of certificates and monitoring of certificate holders.
As the coordinator of the NF mark, AFNOR Certification determines the terms of use for the mark, which are described in the "Certification Rules for the Mark".
The CSTB works as a certification body authorized to determine the conditions under which the NF mark is issued to applicants, maintained by holders, suspended or withdrawn. These terms are described in the certification reference documents.