NIST is publishing Special Publication (SP) 800-171A, Assessing Security Requirements for Controlled Unclassified Information (CUI). It is intended to help organizations develop assessment plans and conduct efficient, effective, and cost-effective assessments of the CUI security requirements defined in SP 800-171, Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations.
Please submit questions to sec-cert@nist.gov.
CSRC Update: https://csrc.nist.gov/news/2018/nist-publishes-sp-800-171a
Publication details: https://csrc.nist.gov/publications/detail/sp/800-171a/final