§ 254. Presentation by corporation counsel, county attorney or
district attorney. (a) The family court or the appropriate appellate
division of the supreme court may request the corporation counsel of the
city of New York or the appropriate county attorney to present the case
in support of the petition when, in the opinion of the family court or
appellate division such presentation will serve the purposes of the act.
When so requested, the corporation counsel or county attorney shall
present the case in support of the petition and assist in all stages of
the proceedings, including appeals in connection therewith. Nothing
herein shall be deemed to affect the provisions of section five hundred
thirty-five of this chapter.

(b) In all cases involving abuse, the corporation counsel of the city
of New York and outside the city of New York, the appropriate district
attorney shall be a necessary party to the proceeding.