The seniority of an employee shall be lost and the employee shall be terminated for the following reasons:
(a) The employee resigns.
(b) The employee is discharged by the appointing authority.
(c) The employee fails to report to work after fourteen (14) calendar days after a recall notice has been sent.
(d) The employee is absent for five (5) consecutive working days without obtaining an approved leave of absence or notifying the City and substantiating with medical verification that the employee is sick and/or disabled.
(e) The employee fails to return at the expiration of an approved leave of absence.
(f) An employee enters employment for another employer or becomes self-employed while on leave.
(g) An employee is laid off continuously for more than four (4) years.
(h) The employee retires.
(i) When an employee loses seniority for the reasons listed in subsection (c) through (g) above, said employee shall be given written notice of the reason for such loss of seniority. Loss of seniority under paragraphs (d) and (e) shall be subject to a review by the Department of Human Resources. Loss of seniority for any reason except paragraph (b) above, shall not be subject to review under Section 2115.27, “Procedure”, (g) or Section 2115.28, “Appeal”.