decis ec efta joint committe simplif formal trade good octob invit republ poland republ hungari czech republ slovak republ acced convent simplif formal trade good ec joint committe regard convent simplif formal trade good articl thereof promot trade republ poland republ hungari czech republ slovak republ facilit simplif formal context trade good countri european commun republ iceland kingdom norwai swiss confeder view achiev simplif invit countri acced convent decid articl republ poland republ hungari czech republ slovak republ invit acced convent accord articl convent juli articl decis enter forc januari interlaken octob joint committe chairman dietrich oj