From the 2/7/13 issue of the ARRL Letter:
The International Telecommunication Union (ITU) is offering an electronic version of the 2012 International Radio Regulations at no charge. These regulations incorporate the decisions of the World Radiocommunication Conferences of 1995 (WRC-95), 1997 (WRC-97), 2000 (WRC-2000), 2003 (WRC-03), 2007 (WRC-07) and 2012 (WRC-12), including all Appendices, Resolutions, Recommendations and ITU-R Recommendations incorporated by reference.
While Article 25 of the International Radio Regulations defines the Amateur Radio Service, the regulations as a whole define the allocation of different frequency bands to different radio services, as well as the mandatory technical parameters to be observed by radio stations, procedures for the coordination and notification of frequency assignments made to radio stations by national governments and other procedures and operational provisions.
The free download — as well as paper copies and a DVD — are available in English, Arabic, Chinese, Spanish, French and Russian. While the electronic version is available at no charge, the individual paper versions and the DVD containing versions in all six languages cost CHF 398 (approximately $438 USD). The free download is available through mid-2014.