Recommendation 2 of the 12th CCM (2010)
On the use of the international prototype of the kilogram to confirm the traceability of the BIPM prototypes
The Consultative Committee for Mass and Related Quantities (CCM)
to its Recommendation CCM G 1 (2010) which contained a specific recommendation that the traceability of the BIPM prototypes to the international prototype of the kilogram should be confirmed,
that the CIPM gives the Director of the BIPM authority to gain access to the vault containing the international prototype and its official copies and to make use of these prototypes in order to carry out the necessary measurements.