State legislation may regulate the number and ages of children allowed before the home is considered an official daycare program and subject to more stringent safety regulations. Often the nationally recognized Child Development Associate credential is the minimum standard for the individual leading this home care program. Each state has different regulations for teacher requirements. In some states, teachers must have an associate degree in child development. States with quality standards built into their licensing programs may have higher requirements for support staff such as teacher assistants. And in Head Start programs, by 2012, all lead teachers must have a bachelor's degree in Early Childhood Education. States vary in the standards set for daycare providers, such as teacher to child ratios.