Section 21 of Limitation Act "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 made a party:
Provided that were the court is satisfied that the omission to include a new plaintiff or defendant was due to a mistake 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 tendency of a suit or where a plaintiff is made a defendant or a defendant is made a plaintiff
Section 22 of Limitation Act " Continuing breaches and torts"
In the case of a continuing breach of contract or in the case of a continuing tort, a fresh period of limitation beings to run at every moment of the time during the breach or the tort, as the case may be, continues.