(a) For the purposes of this section, "standard transportation practices" means:
(1) Uniform cargo liability rules.
(2) Uniform bills of lading or receipts for property being transported.
(3) Uniform cargo credit rules.
(4) Antitrust immunity for joint line rates or routes, classification, and mileage guides.
(b) A person otherwise exempt from regulation by the Commission under Public Law 103-305 may file an application with the Commission to participate in one or more standard transportation practices under rules set out by the Commission.