Court Fees Act, 1850
21.Effect of substituting or adding new plaintiff or
defendant .-
(1) Where after the institution of a suit, a new plaintiff or
defendant is substituted or added, the suit shall, as regards him, be deemed to
have been instituted when he was so made a party:
Provided that where the court is satisfied that the
omission to include a new plaintiff or defendant was due to mistake made in
good faith it may direct that the suit as regards such plaintiff or defendant
shall be deemed to have been instituted on any earlier date.
(2) Nothing in sub-section (1) shall apply to a case where a
party is added or substituted owing to assignment or devolution of any interest
during the pendency of a suit or where a plaintiff is
made a defendant or a defendant is made a plaintiff.