Respondent No. 4 evidently is junior to the writ-petitioners who are the members of the General Administrative Cadres and they are entitled to promotion according to the joint seniority list prepared in 1991 with all benefits attached to their posts and such benefits cannot be taken away as has been done by the impugned orders as those fail on the doctrine of promissory estoppel.
Chairman, Bangladesh Water Development Board, WAPDA & anr vs Kazi Hedaytul Islam and others 6 BLC (AD) 31.

In Rule 143 of Bangladesh Water Development Board (Employees) Service Rules,1982 is directory and not that of mandatory because there is no provision in the Bangladesh Water Development Board (Employees) Service Rules,1982 that the proceedings drawn up would be treated as invalid or unlawful if the proceedings cannot be completed within the time schedule mentioned in it. .....BWDB =VS= G.A. Faiyaz Haider, (Civil), 2017 (2)– [3 LM (AD) 164] ....View Full Judgment

The proviso to sub-rule(4) of rule 143 provides that the proceeding shall be completed within three months and no consequence is not provided for not completing the proceeding within three months. Therefore, the time frame given in the proviso is also directory. .....BWDB =VS= G.A. Faiyaz Haider, (Civil), 2017 (2)– [3 LM (AD) 164] ....View Full Judgment