(1) A membership interest in a professional limited liability company shall not be sold or transferred except to a person who is eligible to be a member of the company or to the personal representative or estate of a deceased or legally incompetent member. The personal representative or estate of the member may continue to hold a membership interest for a reasonable period but shall not be authorized to participate in any decisions concerning the rendering of professional service.

    (2) The articles of organization or an operating agreement may provide specifically for additional restrictions on the transfer of membership interests.