In order to receive impairment benefits under Part E, the employee must show that:

(a) He or she is a covered Part E employee who has been determined to have contracted a covered illness through exposure to a toxic substance at a DOE facility or a RECA section 5 facility, as appropriate, pursuant to either §§ 30.210 through 30.215 or §§ 30.230 through 30.232 of these regulations; and

(b) He or she has been determined to have an impairment, pursuant to the regulations set out in this subpart, that is the result of the covered illness referred to in paragraph (a) of this section.