21 CFR 801.5 : Food And Drugs (§ 1.1 To Parts 1403-1499) — (Subpart A To Parts 1272-1299) — Food And Drug Administration, Department Of Health And Human Services (Continued) (Subpart A To Parts 1272-1299) — Medical Devices (Subpart A To § 898.14) — Labeling (§ 801.1 To § 801.437) — General Labeling Provisions (§ 801.1 To § 801.18) — Medical devices; adequate directions for use.