The Islamic Republic of Iran has exempted the Qatari citizens holding ordinary passports from tourist visas, allowing them to enter the country once every six months and stay for 15 days, an official source at the Department of Consular Affairs of the Ministry of Foreign Affairs said.Those who wish to make frequent visits for tourism or otherwise are required to obtain an entry visa from one of the embassies and consulates of the Islamic Republic of Iran, the source added.