(a) The adequacy of subject matter preparation and the basis for assignment of certified personnel shall be determined by the successful demonstration of subject matter competence as set forth in paragraph (5) of subdivision (b) of Section 44259.
(b) For the purpose of determining the adequacy of subject matter knowledge of languages for which there are no adequate examinations, the commission may establish guidelines for accepting alternative assessments performed by organizations that are expert in the language and culture assessed.