decis execut committe decemb handbook cross border polic cooper sch execut committe regard articl convent implement schengen agreement regard articl abovement convent decid schengen handbook cross border polic cooper doc sch annex hereto adopt time execut committe declar june doc sch decl repeal schengen manual polic cooper maintain public order secur doc sch rev incorpor handbook cross border polic cooper execut committe decis june doc sch rev repeal contract state incorpor handbook cross border polic cooper nation order forward handbook polic servic implement schengen secretariat respons constantli updat handbook form loos leaf binder end contract state gener secretariat abreast amend made nation fact sheet month presid offic consult state updat gener part updat handbook presid forward handbook european union inform purpos berlin decemb chairman schapper restrict document