council decis decemb accept custom cooper council recommend januari design enabl statist data intern trade collect basi brussel nomenclatur express term revis standard intern trade classif eec council european commun regard treati establish european econom commun articl thereof regard propos commiss regard opinion european parliament member state contract parti convent decemb nomenclatur classif good custom tariff brussel nomenclatur accept custom cooper council recommend decemb correl brussel nomenclatur revis standard intern trade classif adopt unit nation econom social council statist relat extern trade commun trade member state follow brussel nomenclatur present futur form statist data relat extern trade commun trade member state furnish basi intern nomenclatur version classif adopt statist commiss unit nation econom social council octob session januari custom cooper council address recommend state member thereof custom econom union set incorpor custom tariff statist nomenclatur subhead list annex recommend step enabl statist data report unit nation bodi concern basi subhead decid sole articl custom cooper council recommend januari design enabl intern trade statist collect basi brussel nomenclatur express term standard intern trade classif revis accept commun view implement januari commiss inform secretari gener custom cooper council accept brussel decemb council presid rumor oj