As a result of the nationalization process of 1967, Hallmark Hotels was also nationalized and gradually, the institute was handed over to the Tanzania Tourist Corporation (TTC) in 1969.
Considering space problem, the Institute which was known as Tanzania Hotel School was relocated from New Africa Hotel to Dar es Salaam club at Forodhani, Kivukoni Front / Ohio Street. It was during that time when it changed its name to Hotel and Tourism Training Institute. The institute was training students mainly from Parastatal Organizations e.g. TTC, Air Caterers and Railway hotels.
The institute was handed over to the Ministry of Natural Resources and Tourism (Parent Ministry) in 1977. By that time the institute could only accommodate 50 students. As time went on, the demand increased. Students who were self-sponsored were enrolled in big numbers.
Due to the emerging need for improving service delivery and the growth demand of the tourism industry, the institute was launched as an Executive Agency under the Ministry of Natural Resources and Tourism in January 24th 2003 in accordance with the Executive Agency Act No. 30 of 1997 and changed its name into National College of Tourism.