28 CFR § 551.10 - Purpose and scope.
The Warden shall approve an inmate's request to marry except where a legal restriction to the marriage exists, or where the proposed marriage presents a threat to the security or good order of the institution, or to the protection of the public. The Warden may approve the use of institution facilities for an inmate's marriage ceremony. If a marriage ceremony poses a threat to the security or good order of the institution, the Warden may disapprove a marriage ceremony in the institution.
The following state regulations pages link to this page.