110 ILCS 675/20-70
The Board shall at all times maintain in effect a program to assess the oral English language proficiency of all persons providing classroom instruction to students at each campus under the jurisdiction, governance or supervision of the Board, and shall ensure that each person who is not orally proficient in the English language attain such proficiency prior to providing any classroom instruction to students. The program required by this Section shall be fully implemented to ensure the oral English language proficiency of all classroom instructors at each campus under the jurisdiction, governance or supervision of the Board. Any other provisions of this Section to the contrary notwithstanding, nothing in this Section shall be deemed or construed to apply to, or to require such oral English language proficiency of any person who provides classroom instruction to students in foreign language courses only.
110 ILCS 675/20-70