Section 3904.13 - Acceptable forms of bonds(a) The BLM will accept either a personal bond or a surety bond. Personal bonds are pledges of any of the following:(4) Negotiable U.S. Treasury bonds equal in value to the bond amount. Treasury bonds must give the Secretary authority to sell the securities in the case of failure to comply with the conditions and obligations of the exploration license or lease.(b) Surety bonds must be issued by qualified surety companies approved by the Department of the Treasury. A list of qualified sureties is available at any BLM state office.