1. The evaluation shall be an assessment of interpreter's language skills, expressive and receptive skills, professionalism, knowledge of interpreting and ethical practices. Modes of communication that shall be evaluated include, but are not limited to:
(1) American sign language;
(2) Tactile sign;
(3) Language deficient;
(4) Oral;
(5) Pidgin Signed English; and
(6) Any necessary specialized vocabulary, language or mode of communication in popular or regional use among deaf people.
2. The board or an evaluation team shall use testing materials developed by the commission or contracted with a national organization to assess the qualifications of interpreters. All testing materials and records shall be held confidential by the commission.