The issue focused on unlawful acquisitions by governmental entities from privately owned telecommunications carriers under statutes authorizing wiretapping and eavesdropping by governmental entities (sections 502 and 502b). Plaintiffs contended that § 502 was preempted by § 702 because § 502 expressly forbids wiretapping without warrants issued under FISA and FISA Amendments Act provisions authorizing eavesdropping without warrants issued under FISA (subject to FISA wiretapping warrants requiring probable cause). Defendants contended that §§ 502 and 502b preempted § 702 because FISA Amendments Act FISA wiretapping wiretapping statutes authorize