(a) As used in this Code section, the term:

(1) "Affiliated corporation" means, with respect to any corporation, any other corporation related thereto:

(A) As a parent corporation;

(B) As a subsidiary corporation;

(C) As a sister corporation;

(D) By common ownership or control; or

(E) By control of one corporation by the other.

(2) The term "bid" includes proposals.

(b) In any case where two or more affiliated corporations bid for a contract under this Code section and any one or more of such affiliated corporations subsequently rescind or revoke their bid or bids in favor of another such affiliated corporation whose bid is for a higher amount and the contract is awarded at such higher amount to such other affiliated corporation, then the bid bond, proposal guaranty, or other security otherwise required under this article of each affiliated corporation rescinding or revoking its bid shall be forfeited.