This report presents an evaluation of the Federal Interagency Day Care Requirements (FIDCR) conducted by the Department of Health, Education, and Welfare. The evaluation focuses on the appropriateness of the requirements for federally supported day care programs authorized by Title XX of the Social Security Act. The first chapter of the report represent an overview of the current status of day care in the United States and describes the rationale behind the development of the FIDCR. Chapter II examines the impact of the FIDCR on children, families, and providers, covering such topics as grouping of children, caregiver qualifications, social and education services, environmental standards, parent involvement, health and nutrition. Chapter III analyzes the costs of imposing the FIDCR on day care centers, family day care, and in-home care. Chapter IV explores questions of the administration and enforcement of the FIDCR at federal, state, and local levels of government. Chapter V presents conclusions of the report and recommendaitons for revisions in the federal regulations. Appendices include the text and the legislative history of the FIDCR, a summary of comments from panel meetings on the appropriateness of the regulations, and a review of the prelimiary findings of the National Day Care Study. (BD)