28 C.F.R. § 551.12 Eligibility to marry.
Title 28 - Judicial Administration
An inmate's request to marry shall be approved provided: (a) The inmate is legally eligible to marry; (b) The inmate is mentally competent; (c) The intended spouse has verified, ordinarily in writing, an intention to marry the inmate; and (d) The marriage poses no threat to institution security or good order, or to the protection of the public.
Title 28: Judicial Administration
PART 551—MISCELLANEOUS
Subpart B—Marriages of Inmates
§ 551.12 Eligibility to marry.