Under the Supreme Court's Noerr-Pennington doctrine, violations of the antitrust laws cannot be predicated on concerted attempts to influence the passage or enforcement of legislation. In Trucking Unlimited v. California Motor Transport Co. the Ninth Circuit held that Noerr-Pennington protection did not extend to a group of trucking companies who allegedly attempted to foreclose competition by influencing courts and quasi-judicial administrative agencies.
Alan H. Melnicoe,
An Exception to the Noerr-Pennington Doctrine: Conspiracy to Utilize the Judicial and Administrative Agencies to Restrain Trade,
22 Hastings L.J. 1016
Available at: https://repository.uchastings.edu/hastings_law_journal/vol22/iss4/13