decis ec andorra joint committe novemb amend decis arrang applic mutual assist provid articl agreement commun andorra ec joint committe regard agreement form exchang letter european econom commun princip andorra articl thereof decis eec andorra joint committe exclud product cover custom union scope decis extend product cover agreement includ cover custom union mutual assist arrang laid decis oper properli relev member state servic instanc appli decis decis amend decid articl decis amend indent articl replac provis provis agreement articl replac implement decis includ handl request exchang inform respons central custom author princip andorra hand relev commiss depart custom author ec member state determin arrang measur purpos articl decis enter forc dai month adopt joint committe brussel novemb joint committe chairman albert pintat