Since the 1950s, the FCC has increased available spectrum several times, starting with rules for unlicensed devices in the 27-MHz band and above 70 MHz. From 1960 to 1985, additional Part 15 rules were created to accommodate everything from cordless phones to garage door openers. In 1985, the FCC created the unlicensed ISM (Industrial, Scientific and Medical) bands that spurred the development of wireless LANs, allocating spectrum in three separate ranges: 902 MHz to 928 MHz, 2.4 GHz to 2.4835 GHz, and 5.725 GHz to 5.850 GHz. Additional 5-GHz wireless spectrum (5.15 GHz to 5.35 GHz) was allocated in 1998, governed by the U-NII (Unlicensed National Information Infrastructure) rules.
In November 2003, the FCC allocated another 255 MHz of bandwidth between 5.47 GHz and 5.725 GHz for use by U-NII devices, consistent with global spectrum policy recommendations of the ITU. Then, in March 2005, the FCC enacted new regulations allocating 50 MHz of spectrum between 3.6 GHz and 3.65 GHz for wireless broadband services.Note that the above articla id from USA where the regulator is the FCC. In the UK, the regulator is known as OFCOM and it is this body that supplies licensing in the UK.