29 CFR §18.602
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
A witness may not testify to a matter unless evidence is introduced sufficient to support a finding that the witness has personal knowledge of the matter. Evidence to prove personal knowledge may, but need not, consist of the witness' own testimony. This rule is subject to the provisions of § 18.703, relating to opinion testimony by expert witnesses.