Appointments shall be made in accordance with
one of the categories hereinafter set forth, and applications for
appointment shall designate which category of appointment is being
made. Appointment under one category shall not preclude an appointment
of the same person under another category.
Appointments may be made under this section
of employees of the City of Haverhill to be Constables and to exercise
their constable powers in pursuit of their employment and duties for
the City of Haverhill. No person appointed under this section shall
use their constable powers conferred under this section for purposes
outside their official duties, and no additional compensation shall
be given to or received by such a person for the exercise of constable
powers conferred under this section.