N.Y.C. Admin. Code § 27-992: § 27-992 Alterations.

Alterations to elevators, escalators, dumbwaiters and other equipment provided for in this subchapter shall comply with the requirements of article four of subchapter one of this chapter. Minor alterations and ordinary repairs shall comply with the requirements of article five of subchapter one of this chapter except that elevator work shall not constitute a minor alteration or an ordinary repair when it is classified as alteration by the provisions of reference standard RS 18-1.