The memorandum, dated May 17, states that any academics at university-based institutes who are teaching at the elementary- and secondary-school levels are violating the terms of their visas and must leave at the end of this academic year, in June. And it says that, after a “preliminary review,” the State Department has determined that the institutes must obtain American accreditation in order to continue to accept foreign scholars and professors as teachers.

http://chronicle.com/article/State-Department-Directive/131934/