1. Unique device identification: policy regarding compliance dates for class I and unclassified devices : immediately in effect guidance for industry and Food and Drug Administration staff Publication: Silver Spring, MD : Center for Biologics Evaluation and Research, January 16, 2018 Subject(s): Equipment and Supplies -- classificationProduct Labeling -- standardsProduct Packaging -- standardsHumansUnited StatesUnited States. Department of Health and Human Services.United States. Food and Drug Administration.