The manner in which a “legal challenge” is to be initiated is not defined in the Sunshine Act, and it is not clear from the text how specific the grounds for the challenge must be. Thus, the manner in which a legal challenge is initiated, whether by complaint, writ of summons, agreement, “or other traditionally recognized means” is not significant. Tom Mistick & Sons, Inc. v. City of Pittsburgh, 567 A.2d 1107 (Pa. Commw. Ct. 1989), appeal denied, 589 A.2d 695 (Pa. 1990). Appeals under the Right to Know Act may be instructive.