In order to comply with the regulations put forth by the Elementary and Secondary Education Act (ESEA), as amended by the Every Student Succeeds Act (ESSA), states are required to submit evidence associated with their statewide accountability systems to the United States Department of Education (ED) for peer review. Some states have elected to incorporate the ACT assessment into statewide assessment systems, to be used for accountability purposes. As of August 2019, seven states identified ACT as a component of their state assessment system in their peer review submissions: Montana, Nebraska, North Dakota, Oklahoma, West Virginia, Wisconsin, and Wyoming. All seven of these states have received feedback from ED regarding use of the ACT as a statewide assessment, or as an assessment option for districts, and whether each state's peer review submission meets all statutory requirements. The Center on Standards and Assessment Implementation (CSAI) reviewed the feedback provided to these seven states to understand how utilization of this assessment for accountability purposes meets ED requirements. The information included in this brief outlines ED's feedback to these seven states in the decision letters sent to each state regarding their use of the ACT assessment as part of a statewide system. [For the 2017 edition of this report, see ED588466.]