TV White Spaces refers the unoccupied portions of spectrum in the UHF/VHF terrestrial television frequency bands. Operation on the trial and test are currently underway in various countries and some commercial applications are emerging, looking at improving the utilization. The concept of sharing the highly valued UHF spectrum resource and its use with the primary terrestrial television service is a primary concern today. Wireless broad-band applications are the main focus of trials, nonetheless, the usefulness of this highly sought after spectrum is also being considered for other applications, such as machine-tomachine communications (M2M). This paper reviews relevant regulatory aspects concerning the operational implementation of Television White Space (TVWS) devices in some parts of the spectrum allocated to TV broadcasting. Also the paper overviews the different approaches and considerations currently being reviewed for TV white spaces. These approaches are intended for improving the efficiency of the spectrum resource use, through accessing idle spectrum to deliver low-cost implementation and rapid development of user applications.