Every contract for invention development services shall be in writing, and a completed copy shall be given to the customer in accordance with the provisions of these regulations. No contract for invention development services may require payment or any portion thereof to be made by the customer until after 3 business days following the date on which the customer receives a completed copy of it. Every contract for invention development services shall provide for a 3 business day period during which the customer may cancel the contract in accordance with the provisions of these regulations.