12 C.F.R. § 561.24 Immediate family.
Title 12 - Banks and Banking
The term immediate family of any natural person means the following (whether by the full or half blood or by adoption): (a) Such person's spouse, father, mother, children, brothers, sisters, and grandchildren; (b) The father, mother, brothers, and sisters of such person's spouse; and (c) The spouse of a child, brother, or sister of such person.
Title 12: Banks and Banking
PART 561—DEFINITIONS FOR REGULATIONS AFFECTING ALL SAVINGS ASSOCIATIONS
§ 561.24 Immediate family.