As used in this subpart, the following definitions apply:

Eligible area means any area that is primarily dependent on delivery of fuel by water or air for a significant part of the year and where fuel cannot be shipped routinely by means of surface transportation either because of absolute physical constraints or because surface transportation is not practical or is prohibitively expensive.

Fuel means oil, diesel fuel, gasoline and other petroleum products, coal, and any other material that can be burned to make energy.

State entity means a department, agency, or instrumentality of any State.

Surface transportation means transportation by road, rail or pipeline.