I. INTRODUCTION

1. Guaracachi America, Inc. (GUlJracach; America), a company incorporated in the United States of America, and Rurelec pic (Rurelec), a company constituted under the laws in force in the United Kingdom (together, the Claimants), hereby institute arbitration proceedings against the PlurinationBI State of Bolivia (Bolivia, or the Governmenf) under the 1976 Arbitration Rules of the United Nations Commission on International Trade Law (the UNCITRAL Rules).!

2. This arbitration claim is brought pursuant to the Treaty between the Government of the United States of America and the Government of the Republic of Bolivia Concerning the Encouragement and Reciprocal Protection of Investment (the US Treatyi and the Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of Bolivia for the Promotion and Protection of Investments (the UK Treaty) (together, tile Treaties).)

3. The Claimants have duly authorized the undersigned to institute and pursue arbitration proceedings on their behalf against Bolivia under the Treaties.4