15 C.F.R. § 8a.405 – Housing.

(a) Generally. A recipient shall not, on the basis of sex, apply different rules or regulations, impose different fees or requirements, or offer different services or benefits related to housing, except as provided in this section (including housing provided only to married students).
(b) Housing provided by recipient.
1. (1) A recipient may provide separate housing on the basis of sex.
2. (2) Housing provided by a recipient to students of one sex, when compared to that provided to students of the other sex, shall be as a whole:
  1. (i) Proportionate in quantity to the number of students of that sex applying for such housing; and
  2. (ii) Comparable in quality and cost to the student.
(c) Other housing.
1. (1) A recipient shall not, on the basis of sex, administer different policies or practices concerning occupancy by its students of housing other than that provided by such recipient.
2. (2)
  1. (i) A recipient which, through solicitation, listing, approval of housing, or otherwise, assists any agency, organization, or person in making housing available to any of its students, shall take such reasonable action as may be necessary to assure itself that such housing as is provided to students of one sex, when compared to that provided to students of the other sex, is as a whole:
    1. (A) Proportionate in quantity; and
    2. (B) Comparable in quality and cost to the student.
  2. (ii) A recipient may render such assistance to any agency, organization, or person that provides all or part of such housing to students of only one sex.