Section 25 in Tamil Nadu Municipal Service Rules, 1970
25. Seniority. - The seniority of a person appointed to any class or category of service shall be determined with reference to his rank in the list of approved candidates or promotion panel, as the case may be:
Provided that the seniority of person who was already a member of a service of the 14th day of January 1970 shall be determined with reference to the date of his first appointment to the service, class or category thereto.
