I HAVE FRIEND, WHO'S UNDER WORKING VISA BEFORE AND GOT TERMINATED. AND AFTER A YEAR OF STAYING IN OUR COUNTRY SHE GOT A JOB AGAIN HERE IN DOHA W/O NOC.... I HAD 1 PASSENGER BEFORE AND HE ADVISED ME THAT AS PER LABOR YOU CAN COME BACK HERE IN DOHA AFTER 6 MONTHS AND ANOTHER A FRIEND OF MINE CONFIRMED IT TO ME ALSO. BETTER CHECK WITH LABOR OR IMMIGRATION ABOUT THIS. FOR U TO MAKE SURE.