N. BIRENDRA SINGH vs L. PRIYOKUMAR SINGH .

The Supreme Court addressed the issue of seniority and regularization of service under the Assam Service Rules, emphasizing that an employee's seniority should be determined from the date of their initial ad-hoc appointment if regularization is granted retrospectively. The Court held that the appellant's seniority must be recognized from 5.2.1980, the date of his initial appointment, as per the directions of the Gauhati High Court. The judgment reinforced the principle that retrospective regularization impacts seniority rights.