Notwithstanding anything contained in Section 28, an Employee shall not be eligible to be a potential candidate for promotion in the following circumstances and during the following period:
(a) In the event of suspension, during the period of suspension,
(b) In the event of withholding of promotion, during the period of withholding,
(c) In the event of withholding of increment in salary, during the period of withholding,
(d) In the case of an Employee who has changed the group pursuant to Section 103, until the Employee completes a service period of three years after the date of such change of group.