The Commission shall, in consultation with the Secretary of Labor, issue rules to clarify the application of this subsection and to prevent evasion thereof. Such rules shall provide for the application of the requirements of paragraph (1) with respect to entities treated as a single employer with respect to an issuer under section
414
(b), (c), (m), or (o) of title
26 to the extent necessary to clarify the application of such requirements and to prevent evasion thereof. Such rules may also provide for appropriate exceptions from the requirements of this subsection, including exceptions for purchases pursuant to an automatic dividend reinvestment program or purchases or sales made pursuant to an advance election.