What is the current state of the law on wiretapping under Title III of the Communications Privacy Act?

[2 Cal.4th 1097] Title III provides a "comprehensive scheme for the regulation of wiretapping and electronic surveillance." (Gelbard v. United States (1972) 408 U.S. 41, 46, 92 S.Ct. 2357, 2360, 33 L.Ed.2d 179). ⁶ The Act makes it unlawful for any person to intercept or endeavor to intercept any wire, oral, or electronic communication "[e]xcept as otherwise specifically" permitted by other provisions of the statute. (18 U.S.C. 2511(1)(a).) Willful disclosure of the contents of communications by a person who knows or has reason to know that the information was obtained through an unlawful interception is also forbidden. (18 U.S.C. 2511(1)(c).)