A delegation from the Shura and Representatives councils left Manama today to take part in a meeting of the Arab Parliament, due to start tomorrow in Cairo and run till December 20. Members of the delegation asserted that joint Arab action will be boosted in the coming period if Arabs join hands and strengthen their belief in the Arab unity, noting that slogans, if not implemented, cannot achieve Arab peoples\' aspirations. They also called upon the Arab Parliament to unify Arab legislations. The Arab Parliament session is expected to review the latest Arab developments, as well as reports of its committees.