30 C.F.R. § 800.23
(a) Definitions. For the purposes of this section only:
Current assets means cash or other assets or resources that are reasonably expected to be converted to cash or sold or consumed within one year or within the normal operating cycle of the business.
Current liabilities means obligations that are reasonably expected to be paid or liquidated within one year or within the normal operating cycle of the business.
Fixed assets means plants and equipment, but does not include land or coal in place.
Liabilities means obligations to transfer assets or provide services to other entities in the future as a result of past transactions.
Net worth means total assets minus total liabilities and is equivalent to owners' equity.
Parent corporation means a corporation which owns or controls the applicant.
Tangible net worth means net worth minus intangibles such as goodwill and rights to patents or royalties.
(b) The regulatory authority may accept a self-bond from an applicant for a permit if all of the following conditions are met by the applicant or its parent corporation guarantor:
(2) The applicant has been in continuous operation as a business entity for a period of not less than 5 years. Continuous operation means that business was conducted over the 5 years immediately preceding the date of application.
(3) The applicant submits financial information in sufficient detail to show that the applicant meets one of the following criteria:
(4) The applicant submits -
(c)
(1) The regulatory authority may accept a written guarantee for an applicant's self-bond from a parent corporation guarantor, if the guarantor meets the conditions of paragraphs (b)(1) through (4) of this section as if it were the applicant. This written guarantee will be referred to as a “corporate guarantee.” The terms of the corporate guarantee must provide for the following:
(d)
(e) If the regulatory authority accepts an applicant's self-bond, the applicant must submit an indemnity agreement subject to the following requirements: