The State of Qatar and the Republic of Chad have signed an \"Open Skies Agreement allowing the two national carriers to operate unlimited number of passenger and Cargo flights between the two countries. It also allows the national carriers of both countries to enter into trade agreements according to the fifth freedom and code sharing between the two airlines.   The agreement was signed for Qatar by Mr. Abdul Aziz Mohammad al-Noaimi, Chairman of Qatar Civil aviation Authority (QCAA) while it was signed for Chad by the Ministry of Transport and Civil Aviation.  (QNA)