This report provides the text of and materials related to the Missing Children's Assistance Act of 1983 (S.2014), a bill reauthorizing and amending: (1) the Juvenile Justice and Delinquency Prevention Act of 1974 to provide for assistance in locating missing children; and (2) the Runaway and Homeless Youth Act. Sections of the bill focus on findings, definitions, administrative duties and functions, grants, advisory board formation, and criteria for grants. These discussions are followed by sections delineating the purpose and history of the legislation. The next sections present amendments to the bill and provide an analysis of its provisions. Briefly included in subsequent sections are a regulatory impact statement, a record of the committee vote, and mention of the Congressional Budget Office cost estimate. A substantial portion of the report provides the views of the United States Department of Justice on the bill. The department's proposed amendment in the nature of a substitute would incorporate provisions of the Senate's Title VI of S.1972 into the House of Representative's H.R. 2175; it also provides for a federal program within the Department of Justice as contained in S.2014. The concluding section of the report specifies changes in existing law made by S.2014. (RH)