decis ec turkei associ council decemb arrang involv turkish expert work technic committe ec ec turkei associ council regard decis ec turkei associ council implement final phase custom union articl thereof decis turkish expert involv work committe refer annex decis requir ensur proper function custom union arrang made particip committe decid articl turkei appoint expert repres meet committe refer annex decis expert member turkish govern servic involv work committe concern function custom union express turkei posit expert entitl vote expert opinion put record separ accord provis chapter decis articl commiss european commun good time inform expert refer articl date meet item agenda committe repres turkei commiss forward relev inform expert articl initi chairman committe meet expert repres turkei present case turkei inform articl decis enter forc date decis enter forc brussel decemb ec turkei associ council presid atienza serna