Names may be removed from an eligible list by action of the Commission for the following reasons in addition to those heretofore considered.
a. Request of the eligible.
b. Failure to report for the interview and/or failure to accept appointment upon certification unless a waiver of such certification is granted by the Commission.
c. Four (4) different certifications without receiving appointment.
d. Upon resignation, from promotional eligibility lists.
e. Any other just or reasonable cause as determined by the Commission.