28th meeting of the CGPM

“The International Bureau shall operate under the exclusive direction and supervision of an International Committee for Weights and Measures, itself placed under the authority of a General Conference on Weights and Measures consisting of the delegates of all the contracting Governments.”

Excerpt from the Metre Convention (1875): Article 3 (BIPM translation)

“The General Conference, mentioned in Article 3 of the Convention, shall meet in Paris, on the convocation of the International Committee at least once every six years. Its mission is to discuss and instigate measures necessary for the propagation and improvement of the metric system as well as to approve new fundamental metrological determinations that might have been made in the interval between its meetings. It receives the Report of the International Committee on work accomplished […].
Votes at a General Conference are made by States, each State has the right to one vote. Members of the International Committee have a seat as of right at meetings of the Conference; they may, at the same time, be delegates of their Governments.”

Excerpt from the Regulations annexed to the Metre Convention (1875): Article 7 (BIPM translation)