Code of Federal Regulations Title 28. Judicial Administration § 28.551.12 Eligibility to marry

(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.