N.Y. Comp. Codes R. & Regs. tit. 17, § 720.1
(h) Fire block upholstery shall mean any exterior material that will not sustain flame.
Note:
Material must be capable of withstanding tests such as “Boston Bag Method” or equivalent without allowing flame to penetrate and ignite seat filler material.
(t) School activities shall be defined as any program for the benefit of pupils, sponsored and supervised by school officials, and shall include, but shall not be limited to such activities as the following, when so supervised and sponsored:
(v) School service means the transportation by motor vehicle of passengers under the age of 21 years to and/or from school or school activities, with or without adult supervisory personnel, either:
(x) Type “A” bus is a bus with a conversion or body constructed upon a van-type or cutaway front-section vehicle with a left side driver's door and designed to carry more than 10 persons. The following are sub-categories of Type “A” bus: