18 Pa.C.S. § 4905: False alarms to agencies of public safety.

(a) Offense defined.--A person commits an offense if he knowingly causes a false alarm of fire or other emergency to be transmitted to or within any organization, official or volunteer, for dealing with emergencies involving danger to life or property.

(b) Grading.--An offense under this section is a misdemeanor of the first degree unless the transmission of the false alarm of fire or other emergency occurs during a declared state of emergency and the false alarm causes the resources of the organization to be diverted from dealing with the declared state of emergency, in which case the offense is a felony of the third degree.