Notwithstanding anything contained in Section 21, a civil 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) During the period of five years after the date of change in the service or group in the case of an employee who has so changed the service or group pursuant to Section 26 and after the change in the service or group in the case of an employee who has got such a change upon an application made by himself/herself.