A form of prospectus that reflects facts or events other than those covered in paragraphs (b) (1), (2) and (6) of this section that constitute a substantive change from or addition to the information set forth in the last form of prospectus filed with the Commission under this section or as part of a registration statement under the Securities Act shall be filed with the Commission no later than the fifth business day after the date it is first used after effectiveness in connection with a public offering or sales, or transmitted by a means reasonably calculated to result in filing with the Commission by that date.