N.Y. Comp. Codes R. & Regs. tit. 15 § 3.4
Knowledge tests appropriate for the class of license or license endorsement shall be in written form and shall be available in both English and Spanish. However, a knowledge test may be given in other than written form if the agent of the commissioner in charge of administering knowledge tests in that office is satisfied that the applicant is incapable of undertaking and completing a written test. The alternative testing procedure shall be oral and, unless a time, conditions and procedures for the giving of such tests in another language acceptable to the agent may be established, the test shall be in English, except that alternative CDL knowledge tests shall only be given in English and Spanish; provided, however, that the knowledge test for the hazardous materials endorsement shall only be given in written form and in English.
N.Y. Comp. Codes R. & Regs. Tit. 15 § 3.4