Section 27 in Tamil Nadu Municipal Service Rules, 1970
27. Completion of probation and promotion. - (a) A person who is appointed to a service in a class or category thereof shall not be promoted from the said class or category until he has completed his probation therein.
(b)Subject to the provision of clause (a), a member of a service in any class or category may be promoted from the said class or category even though he may not have completed his probation therein.
