In order to rely on the exemption provided by section 4.1, an eligible institutional investor shall file a report
(a) within 10 days after the end of the month in which the eligible institutional investor elected to begin to file reports for the reporting issuer under this Part, if the securityholding percentage of the eligible institutional investor in a class of voting or equity securities of the reporting issuer at the end of the month is 10 percent or more;
(b) within 10 days after the end of the month in which the securityholding percentage of the eligible institutional investor in a class of voting or equity securities of the reporting issuer, as at the end of the month, increased to 10 percent or more;
(c) within 10 days after the end of the month in which the securityholding percentage of the eligible institutional investor in a class of voting or equity securities of the reporting issuer, as at the end of the month, increased or decreased past thresholds that are products of whole numbers multiplied by 2.5 percent of the outstanding securities of the class and that are in excess of 10 percent of the outstanding securities of the class; and
(d) within 10 days after the end of the month in which the securityholding percentage of the eligible institutional investor in a class of voting or equity securities of the reporting issuer, as at the end of the month, decreased to less than 10 percent.