Disclosure of substantial shareholding requires notice to the company and exchanges within prescribed transitional periods. Regulation 6 requires persons holding more than five percent of shares or voting rights and promoters or controllers (including persons acting in concert) to disclose their aggregate holdings and percentages to the company within the transitional two month period; companies must, within three months, disclose to all stock exchanges the aggregate holdings of such persons and the names, addresses, and holdings of promoters and controlling persons.