Metre Convention
The tenth committee is called the Consultative Committee for Units (CCU). Its chairman is appointed by the CIPM. Other members of the committee are appointed by other organizations.  These organizations include International Organization for Standardization (ISO) and National Institute of Standards and Technology (NIST). The CCU's task is to ensure that all the definitions of SI are consistent.  It also drafts the SI standard which is called the SI Brochure.