This cover only issue indicates that there are no new regulations or regulatory changes from the previous 21 CFR Parts 100-169 volume. You can purchase this previous volume in microfiche format here: https: //bookstore.gpo.gov/products/t-21-pts-100-169-code-federal-regulation-microfiche-2017 and previous print format issue can be found here: https: //bookstore.gpo.gov/products/code-federal-regulations-title-21-food-and-drugs-pt-100-169-revised-april-1-2017. This print cover only volume is free to annual print CFR subscription subscribers. To sign up for an annual 2018 CFR subscription, click here: https: //bookstore.gpo.gov/products/code-federal-regulationspaper2018 Additional items produced by the U.S. Department of Health & Human Services can be found here: https: //bookstore.gpo.gov/agency/department-health-and-human-services-hhs