which are the states that are members of this conference?
Argentina,  Australia, Austria to name a few..
General Conference on Weights and Measures
Argentina (1877)
Australia (1947)
Austria (1875)
Belgium (1875)
Brazil (1921)
Bulgaria (1911)
Canada (1907)
Chile (1908)
China (1977)
Colombia (2012) 
Croatia (2008)
Czech Republic (1922)
Denmark (1875)
Egypt (1962)
Finland (1913)
France (1875)
Germany (1875)
Greece (2001)
Hungary (1925)
India (1957)
Indonesia (1960)
Iran (1975)
Iraq (2013)
Ireland (1925)
Israel (1985)
Italy (1875)
Japan (1885)
Kazakhstan (2008)
Kenya (2010)
Lithuania (2015)
Malaysia (2001)
Mexico (1890)
Montenegro (2018)
Netherlands (1929)
New Zealand (1991)
Norway (1875)
Pakistan (1973)
Poland (1925)
Portugal (1876)
Romania (1884)
Russian Federation (1875)
Saudi Arabia (2011)
Serbia (2001)
Singapore (1994)
Slovakia (1922)
Slovenia (2016)
South Africa (1964)
South Korea (1959)
Spain (1875)
Sweden (1875)
Switzerland (1875)
Thailand (1912)
Tunisia (2012)
Turkey (1875)
Ukraine (2018)
United Arab Emirates (2015)
United Kingdom (1884)
United States (1878)
Uruguay (1908)
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
wiki:1632762
General Conference on Weights and Measures [SEP] Member States
Argentina (1877) Australia (1947) Austria (1875) Belgium (1875) Brazil (1921) Bulgaria (1911) Canada (1907) Chile (1908) China (1977) Colombia (2012) Croatia (2008) Czech Republic (1922) Denmark (1875) Egypt (1962) Finland (1913) France (1875) Germany (1875) Greece (2001) Hungary (1925) India (1957) Indonesia (1960) Iran (1975) Iraq (2013) Ireland (1925) Israel (1985) Italy (1875) Japan (1885) Kazakhstan (2008) Kenya (2010) Lithuania (2015) Malaysia (2001) Mexico (1890) Montenegro (2018) Netherlands (1929) New Zealand (1991) Norway (1875) Pakistan (1973) Poland (1925) Portugal (1876) Romania (1884) Russian Federation (1875) Saudi Arabia (2011) Serbia (2001) Singapore (1994) Slovakia (1922) Slovenia (2016) South Africa (1964) South Korea (1959) Spain (1875) Sweden (1875) Switzerland (1875) Thailand (1912) Tunisia (2012) Turkey (1875) Ukraine (2018) United Arab Emirates (2015) United Kingdom (1884) United States (1878) Uruguay (1908)