In order to rationalize the compliance requirement under Clause 4 of Schedule B read with Regulation 9 of PIT Regulations, improve ease of doing business and prevent inadvertent non-compliances of provisions of PIT Regulations by DPs, after having deliberations with Stock Exchanges and Depositories and listed companies, it has been decided that Stock Exchanges and Depositories shall develop a system to restrict trading by DPs of listed company during trading window closure period.