N.Y. LLC Law § 1304

§ 1304. Foreign professional service limited liability company. No\nforeign professional service limited liability company shall engage in\nany profession or carry on, or conduct or transact any other business or\nactivities in this state other than the rendering of the professional\nservices or the carrying on, or conducting or transacting of any other\nbusiness or activities for which it is formed and is authorized to do\nbusiness in this state; provided that such limited liability company may\ninvest its funds in real estate, mortgages, stocks, bonds or any other\ntype of investments; provided, further, that a foreign professional\nservice limited liability company (i) authorized to practice law may\nonly engage in another profession or other business or activities in\nthis state or (ii) which is engaged in a profession or other business or\nactivities other than law, may only engage in the practice of law in\nthis state, to the extent not prohibited by any other law of this state\nor any rule adopted by the appropriate appellate division of the supreme\ncourt or the court of appeals.\n