According to the wording of the law, ANY interaction with a uniformed first responder qualifies.
Definition: Encounter(3) An individual licensed under this act to carry a concealed pistol and who is carrying a concealed pistol or a portable device that uses electro-muscular disruption technology and who is stopped by a peace officer or who encounters, in his or her official capacity, a firefighter or emergency medical services personnel shall immediately disclose to the peace officer, firefighter, or emergency medical services personnel that he or she is carrying a pistol or a portable device that uses electro-muscular disruption technology concealed upon his or her person or in his or her vehicle.
1) to meet as an adversary or enemy; to engage in conflict with
2) to come upon face to face
3) to come upon or experience especially unexpectedly; to meet especially by chance
In the same aisle in the grocery store as a fireman buying food? Disclose. EMT in a gas station? Disclose. Walking past them in a parking lot? Disclose.