Except as provided in subsection (d), any person subjected to any legal proceeding for damages, injunction, penalties, or other relief of any kind under the antitrust laws, or any State law similar to any of the antitrust laws, on account of setting or agreeing to rates of return or other terms for, negotiating, issuing, participating in, implementing, or otherwise being involved in the planning, issuance, or payment of charitable gift annuities or charitable remainder trusts shall have immunity from suit under the antitrust laws, including the right not to bear the cost, burden, and risk of discovery and trial, for the conduct set forth in this subsection.