A claimant may authorize any individual to represent him or her in
regard to a claim under the FECA, unless that individual's service as a
representative would violate any applicable provision of law (such as 18
U.S.C. 205 and 208). A Federal employee may act as a representative
only:
(a) On behalf of immediate family members, defined as a spouse,
children, parents, and siblings of the representative, provided no fee
or gratuity is charged; or
(b) While acting as a union representative, defined as any
officially sanctioned union official, and no fee or gratuity is charged.