A Checklist to evaluate whether an interlocking directorate (also known as an interlock) violates Section 8 of the Clayton Act (15 U.S.C. § 19) or other antitrust laws. This Checklist addresses the antitrust considerations when a person serves as an officer or on the board of directors of competing corporations, factors leading to violations of Section 8, the exceptions or exemptions to Section 8, proactive ways to address Section 8 violations, and the potential application of Section 5 of the FTC Act and Section 1 of the Sherman Act to interlocks.