20 C.F.R. § 416.1144
(a) Definitions. For purposes of this section the following definitions apply:
(1) Nonprofit retirement home or similar institution means a nongovernmental institution as defined under § 416.1101, which is, or is controlled by, a private nonprofit organization and which does not provide you with—
(3) An express obligation to provide your full support and maintenance means there is either a legally enforceable written contract or set of membership rules providing that the home, institution, or organization—
(b) How the presumed value rule applies. The presumed value rule applies if you are living in a nonprofit retirement home or similar institution where there is an express obligation to provide your full support and maintenance or where someone else pays for your support and maintenance. The rule does not apply to the extent that—
[45 FR 65547, Oct. 3, 1980, as amended at 51 FR 34464, Sept. 29, 1986; 70 FR 6345, Feb. 7, 2005]