The Child Care and Development Block Grant Act of 2014 (CCDBG Act) added new requirements for States receiving Child Care and Development Fund (CCDF) funds to conduct comprehensive criminal background checks on staff members and prospective staff members of childcare providers prior to employment and every 5 years thereafter. States must have requirements, policies, and procedures in place to conduct criminal background checks for staff members of childcare providers (other than relatives) that are licensed, regulated, or registered under State law or receive CCDF funds. Background check requirements apply to any staff member who is employed by a childcare provider for compensation or whose activities involve the care or supervision of children or unsupervised access to children. Our objective was to determine Colorado’s progress toward implementing new criminal background check requirements established under the CCDBG Act. (author abstract)