(a) The sale is represented by an over-allotment in which the dealer is participating as a member of an underwriting group, or the dealer or a person acting on his behalf intends in good faith to offset such sale with a security to be acquired by or on behalf of the dealer as a participant in an underwriting, selling or soliciting-dealer group of which the dealer is a member at the time of the sale, whether or not the security to be so acquired is subject to a prior offering to existing security holders or some other class of persons; and

(b) Other persons not within the purview of Section 3 of the Act are participating in the distribution of such block of securities on terms at least as favorable as those on which such dealer is participating and to an extent at least equal to the aggregate participation of all persons exempted from the provisions of Section 3 of the Act by this section. However, the performance of the functions of manager of a distributing group and the receipt of a bona fide payment for performing such functions shall not preclude an exemption which would otherwise be available under this section.

(a) Whenever any person is entitled, as an incident to his ownership of an issued security and without the payment of consideration, to receive another security “when issued” or “when distributed,” the security to be acquired shall be exempt from the operation of Section 3, provided that:

(b) This section shall not be construed as exempting transactions involving both a sale of a security “when issued” or “when distributed” and a sale of the security by virtue of which the seller expects to receive the “when-issued” or “when-distributed” security, if the two transactions combined result in a sale of more units than the aggregate of those owned by the seller plus those to be received by him pursuant to his right of acquisition.