who hosts or conducts this conference?
General Conference on Weights and Measures (CGPM), CGPM meetings are chaired by the Président de l'Académie des Sciences de Paris.
General Conference on Weights and Measures
CGPM meetings are chaired by the Président de l'Académie des Sciences de Paris.
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) when was this established? 20 May 1875 which are the states that are members of this conference? Argentina,  Australia, Austria to name a few..
wiki:1632759
General Conference on Weights and Measures [SEP] Membership criteria
The CGPM recognises two classes of membership – full membership for those states that wish to participate in the activities of the BIPM and associate membership for those countries or economies that only wish to participate in the CIPM MRA program. Associate members have observer status at the CGPM. Since all formal liaison between the convention organisations and national governments is handled by the member state's ambassador to France, it is implicit that member states must have diplomatic relations with France, though during both world wars, nations that were at war with France retained their membership of the CGPM. CGPM meetings are chaired by the Président de l'Académie des Sciences de Paris.