Classwork may only be conducted in locations approved by the Division of Motor Vehicles. The classroom facility shall meet the following minimum requirements:

1. a minimum overall size of not less than 120 square feet (which includes at least 70 square feet for the instructor and his equipment and at least 12 square feet for each student);
   
   
2. lighting, heating, and ventilation systems that are in compliance with all state and local laws and ordinances including, but not limited to, zoning, public health, safety, and sanitation;
   
   
3. secretarial or telephone answering service available for a minimum of six hours between 9:00 a.m. and 5:00 p.m. on normal business days;
   
   
4. a copy of North Carolina Motor Vehicle Laws Chapter 20 of the General Statutes; and
   
   
5. if located in conjunction with classroom facilities, office must be separated by a physical barrier.