From the Overview and Acknowledgements: "This report is submitted to the Congress by the Department of State pursuant to Sections 116(d) and 502B(b) of the Foreign Assistance Act of 1961. 19 U.S.C. [U.S. Code] § 2464, 2467 also require that U.S. foreign and trade policy take into account countries' human rights and worker rights performance and that country reports be submitted to the Congress on an annual basis. This report includes documents on several countries that do not fall into the categories established by these statutes and thus are not covered by the congressional requirement. The report addresses situations and events in calendar year 2020 only."
U.S. Department of State: https://www.state.gov/