(a) An SBDC may charge clients a reasonable fee to cover the costs of training (sponsored or cosponsored) by the SBDC, the sale of books, the rental of equipment or space, research work, hiring outside consultants for a particular client, or other specialized services.(b) SBDC network entities, staff, consultants, or volunteers must not solicit or accept fees or other compensation for counseling services, including, but not limited to, business or marketing plan development, loan packaging or credit application assistance, or other advisory services described in section 21 of the Small Business Act.