S.SUMNYAN vs LIMI NIRI .

The Supreme Court held that the seniority of Assistant Engineers in the Arunachal Pradesh Public Works Department must be determined based on the date of regularization rather than the ad-hoc service period. The Court affirmed the High Court's decision to correct the seniority list by recognizing the appointment date of the private respondent as 02.05.1989, thereby excluding the ad-hoc service of the appellants from seniority calculations. The Court emphasized that the rules governing regularization and seniority must be adhered to, leading to the dismissal of the appeal by the appellants.