Insider trading restrictions: unlawful sharing or procurement of unpublished price sensitive information barred except for legitimate corporate purposes. Regulation 3 forbids insiders from communicating or allowing access to unpublished price sensitive information except for legitimate purposes, performance of duties or legal obligations; it similarly prohibits procuring such information unlawfully. Boards must define legitimate purposes, treat recipients who receive UPSI for such purposes as insiders with confidentiality obligations, and may permit sharing for transactions deemed in the company's best interests subject to public dissemination where required. Boards must ensure confidentiality agreements, restrict trading by recipients, and maintain an internal structured digital database recording UPSI sharing with audit controls and retention safeguards.