An eligible institutional investor that has become disqualified under section 4.2 from filing reports under this Part for a reporting issuer, if the securityholding percentage of the eligible institutional investor in a class of voting or equity securities of the reporting issuer is 10 percent or more, shall not acquire ownership of, or control over, any additional securities of the reporting issuer for the period
(a) starting at the time that the news release referred to in paragraph 4.3(1)(a) is required to be filed; and
(b) ending 10 days after the news release is filed.