(a) Consolidation of two police agencies. The chief of police of both agencies involved in the consolidation and the chief executive officer of both municipalities involved in the consolidation.
(b) Consolidation of all or a combination of more than two existing police departments in the county. In cases where all or a combination of existing police departments in the county are being merged into a uniform county or part-county police department, then the chiefs of police of the departments involved in the merger shall select from among themselves one member to represent the group. Similarly all the chief executives of the municipalities involved in the merger shall select one of their members to represent the group.
(c) Consolidation of all or a combination of more than two existing police departments in the county and the criminal division of the sheriff's department. In addition to the members of the board previously indicated, there shall be added to the board, the sheriff.
(d) For the purposes of this section, the chief of police means that person who is employed by a municipality on a full-time salaried basis for the express purpose of administering a police department and who has successfully passed a civil service examination for chief of police, and has received such appointment.