(a) Procedures and materials for assessment and placement of students who are deaf or hard of hearing shall be selected and administered so as not to be racially, culturally, or sexually discriminatory.
(b) A single assessment instrument may not be the sole criterion for determining the placement of a student.

(c) The procedures and materials for the assessment and placement of a student who is deaf or hard of hearing shall be in the student’s preferred mode of communication. All other procedures and materials used with any student who is deaf or hard of hearing and who has limited English proficiency shall be in the student’s preferred mode of communication.