The Brazilian telecoms regulator Anatel has published the tender rules for its proposed auction for licences in the 3.5GHz and 10.5GHz bands. The spectrum can be used to offer WiMAX-based wireless broadband services and will be valid for 15 years, with the option of an extension. Interested bidders must submit their proposals by 4 September. The new licences will be allocated across three Brazilian regions, although incumbent fixed line operators Telefônica Brazil, Telemar and Brasil Telecom will not be allowed to purchase blocks of spectrum for areas where they already have fixed line operating licences. Anatel hopes to stimulate competition and broadband penetration by keeping prices low. Local analysts predict that broadband growth will reach around 40% per annum for the next four years.