In the fall of 2009, the Chicago Board of Health will adopt changes to child-care regulations intended to improve nutrition standards, establish minimum time requirements for physical activity and set maximum time requirements for screentime. During a two-year voluntary phase-in period child-care providers will receive education and training to facilitate compliance. This study will evaluate the effects of child-care regulation changes on child-care practices and examine how center characteristics influence compliance. Researchers will use a two-group, non-randomized design with two waves of data collection to study the impact of voluntary regulation compliance and a qualitative case-study approach to investigate factors that facilitate and constrain compliance. Study results will provide implementation guidance as the policy becomes mandatory within the two-year framework.