when was this established?
20 May 1875
General Conference on Weights and Measures
On 20 May 1875 an international treaty known as the "Convention du Mètre" (Metre Convention) was signed by 17 states. This treaty established an international organisation, the Bureau international des poids et mesures (BIPM), consisting of:
having all units in atomic standards is more useful. explain UNANSWERABLE is there a body or organization that controls it? Yes - General Conference on Weights and Measures (CGPM)
wiki:1632757
General Conference on Weights and Measures [SEP] Establishment
On 20 May 1875 an international treaty known as the "Convention du Mètre" (Metre Convention) was signed by 17 states. This treaty established an international organisation, the Bureau international des poids et mesures (BIPM), consisting of: The CGPM acts on behalf of the governments of its members. In so doing, it appoints members to the CIPM, receives reports from the CIPM which it passes on to the governments and national laboratories on member states, examines and where appropriate approves proposals from the CIPM in respect of changes to the International System of Units (SI), approves the budget for the BIPM (over €13 million in 2018) and it decides all major issues concerning the organization and development of the BIPM.