(U) For purposes of applying the 90-day rule, conduct that violates or is otherwise inconsistent with an alien’s nonimmigrant status includes, but is not limited to:
(i) (U) Engaging in unauthorized employment;
(ii (U) Enrolling in a course of academic study, if such study is not authorized for that nonimmigrant classification (e.g. B status);
(iii) (U) A nonimmigrant in B or F status, or any other status prohibiting immigrant intent, marrying a United States citizen or lawful permanent resident and taking up residence in the United States; or
(iv) (U) Undertaking any other activity for which a change of status or an adjustment of status would be required, without the benefit of such a change or adjustment.