(A)   Any person interested in becoming a member of the Hagerstown-Jefferson Township Volunteer Fire Department shall obtain an application from the Chief Officer, which he or she shall properly fill out and sign. These applications shall be used in filling all vacancies.
   (B)   As vacancies occur, the Chief will convene his or her membership advisory group of officers, weigh all possibilities and probabilities, and after due deliberation, the Chief will make an appointment.
   (C)   The appointment will be made under a 90-day period of probation during which time the individual will be observed and tested as to his or her ability to adapt to the rigors of fire prevention, fire extinguishment, fire overhaul, fire investigation, maintenance, and esprit de corps.