 Broch, director of the BIPM replied that he was not authorized to perform any such calibrations for non-member states.On 17 September 1884, the British Government signed the convention.This number grew to 21 in 1900, 32 in 1950, and 49 in 2001. , the General Conference membership was made up of 62 member states, 40 associate states and economies and four international organizations as follows (with year of partnership between brackets)