§ 909. Pleadings; amended and supplemental.

(a) A party may amend his pleading once without leave of court at any
time before the period for responding to it expires, or within ten days
after its service or the service of a pleading responding to it. An
amended pleading which requires a responsive pleading shall be responded
to within ten days after it is served, or within ten days after the
expiration of the period during which the original pleading could have
been responded to, whichever is later.

(b) Except as provided in subdivision (a), the CPLR shall govern
amended and supplemental pleadings in this court.