CMS CHILE S.A.
December 31st, 2006

Legal Status
Sistemas y Equipos Mineros SA is a private limited company established 29 July 1992.

Capital subscribed and paid in
The capital of CMS Chile is US$9,320,000 and consists of 69,000 shares. These shares have no nominal value.

Purpose
The purpose of this company is to manufacture, sell and distribute in Chile and abroad, machinery equipment and replacement parts. Furthermore, through its subsidiary, CMS Tecnología SA it provides integrated maintenance services to the main large-scale mining operations in northern and central Chile.

Board of Directors
Alex Acosta Maluenda, President Board of Directors (*)
Waldo Fortin Cabezas, Director (*)
Mario Espinoza Durán, Director (*)
Luis Farías Lasarte (*)

General Manager
José Robles Becerra (*)

Codelco's share of capital and changes during the fiscal year
Codelco Chile owns 100% of CMS Chile SA, and this, in turn, held 30.23% of CMS Tecnología SA up to September 2005. In 2005, Codelco took bids on 70% of CMS
Tecnología SA shares and in September received offers.
ABB (Asea Brown Bovery) won the bids and took control of CMS Tecnología SA in late October, eliminating CMS Chile's ownership.

Commercial relations with Codelco
The company had no commercial activity in 2006, after the selling of its entire share of CMS Tecnología SA in 2005, and is not expected to have any in the future.

Contracts with Codelco
The company had no commercial activity in 2006

Investment as a percentage of total head office
2006 investment in subsidiary US$0.
2005 Investment in subsidiary US$0.
Total investment as a percentage of head office assets 0%, 2006.