InvITs must hold HoldCo and SPV securities in dematerialized form; Investment manager responsible; deadline June 30, 2023. InvITs must hold securities of their holding companies and special purpose vehicles in dematerialized form, and the investment manager is responsible for ensuring compliance. Existing securities held in physical form must be dematerialized on or before June 30, 2023. The requirement is issued under the regulator's statutory powers and Regulation 33 and is effective immediately.