(a) For the purpose of fulfilling the foreign language requirements for a college preparatory curriculum seal of endorsement on a high school diploma, a demonstrated proficiency in American Sign Language shall be accepted as a foreign language for any student by all local boards of education and the State Board of Education. A demonstrated proficiency in American Sign Language shall be accepted as the equivalent of the required two units of a foreign language.
(b) For the purpose of earning Carnegie unit curriculum credits at the high school level, American Sign Language may be accepted by the State Board of Education for two or more units of elective credit or for two or more units of foreign language credit, pursuant to subsection (a) of this Code section.