30 CFR § 800.5 - Definitions.
(a) Surety bond means an indemnity agreement in a sum certain payable to the regulatory authority, executed by the permittee as principal and which is supported by the performance guarantee of a corporation licensed to do business as a surety in the State where the operation is located.
(b) Collateral bond means an indemnity agreement in a sum certain executed by the permittee as principal which is supported by the deposit with the regulatory authority of one or more of the following:
(1) A cash account, which shall be the deposit of cash in one or more federally-insured or equivalently protected accounts, payable only to the regulatory authority upon demand, or the deposit of cash directly with the regulatory authority;
(2) Negotiable bonds of the United States, a State, or a municipality, endorsed to the order of, and placed in the possession of, the regulatory authority;
(3) Negotiable certificates of deposit, made payable or assigned to the regulatory authority and placed in its possession or held by a federally-insured bank;
(4) An irrevocable letter of credit of any bank organized or authorized to transact business in the United States, payable only to the regulatory authority upon presentation;
(5) A perfected, first-lien security interest in real property in favor of the regulatory authority; or
(6) Other investment-grade rated securities having a rating of AAA, AA, or A or an equivalent rating issued by a nationally recognized securities rating service, endorsed to the order of, and placed in the possession of, the regulatory authority.
(c) Self-bond means an indemnity agreement in a sum certain executed by the applicant or by the applicant and any corporate guarantor and made payable to the regulatory authority, with or without separate surety.