13 CFR § 121.509 - What is the size standard for leasing of Government land for coal mining?
A concern is small for this purpose if it:
(a) Together with its affiliates, does not have more than 250 employees;
(b) Maintains management and control of the actual mining operations of the tract; and
(c) Agrees that if it subleases the Government land, it will be to another small business, and that it will require its sublessors to agree to the same.
The following state regulations pages link to this page.