10 CFR §503.10

1. (a)OFE finding. Except in the case of an exemption for fuel mixtures, OFE may deny permanent exemptions authorized under section 212 of the Act if OFE finds on a site-specific or generic basis that use of a method of fluidized bed combustion of an alternate fuel is economically and technically feasible.
2. (b)Demonstration. If OFE has made such a finding, OFE will deny a petitioner's request for exemption unless the petitioner demonstrated that the use of a method of fluidized bed combustion is not economically or technically feasible. The petition or any supplement thereto required by OFE must include the following evidence:
   1. (1)If use of a method of fluidized bed combustion were to be required, evidence that the petitioner would be eligible for a permanent exemption for lack of alternate fuel supply, site limitations, environmental requirements, lack of adequate capital, or State or local requirements; or
   2. (2)Use of a method of fluidized bed combustion is not technically or economically feasible due to design or special circumstances.