Except as provided in paragraph (2), service by a volunteer under subsection (a) shall not be considered Federal employment.
For purposes of chapter 171 of title 28, a volunteer under subsection (a) shall be treated as an employee of the Government (as defined in section 2671 of that title).
For purposes of subchapter I of chapter 81 of title 5, a volunteer described in subsection (a) shall be treated as an employee (as defined in section 8101 of title 5).
A volunteer under subsection (a) shall serve without pay, but may receive nominal awards and reimbursement for incidental expenses, including expenses for a uniform or transportation in furtherance of Museum activities.