On August 17, 2011, the Obama Administration published three proposed rules in the Federal Register relating to the eligibility and enrollment of individuals into health coverage under the Affordable Care Act (ACA). Taken together, they offer a comprehensive blueprint of how the Administration is proposing to implement the provisions of the ACA aimed at ensuring that all eligible residents of the United States enroll in coverage beginning January 1, 2014. The proposed rules address the expansion of Medicaid up to 133 percent of the federal poverty level (FPL); procedures for evaluating eligibility for Qualified Health Plans (QHPs) provided through Exchanges; eligibility for and enrollment in “affordability programs” (i.e., Medicaid, CHIP, advance premium tax credits and cost-sharing reductions); and the details of how the advance premium tax credits will be calculated and administered. The following memo provides an overview of some of the key implications of the proposed rules for children and families.