We are changing the Supplemental Security Income (SSI) parent- to-child deeming rules so that we no longer will consider the income and resources of a stepparent when an eligible child resides in the household with a stepparent, but that child's natural or adoptive parent has permanently left the household. These rules respond to a decision by the United States Court of Appeals for the Second Circuit, codified in Social Security Acquiescence Ruling (AR) 99-1(2), and establish a uniform national policy. Also, we are making uniform the age at which we consider someone to be a "child" in SSI program regulations and are making other minor clarifications to our rules.