(a) Every business opportunity contract shall be in writing and a copy shall be given to the purchaser at the time he signs the contract.
(b) Every contract for a business opportunity shall include the following:
(1) The terms and conditions of payment;
(2) A detailed description of the services that the business opportunity seller undertakes to perform for the purchaser;
(3) The seller's principal business address and the name and address of its agent in the State authorized to receive service of process;
(4) The approximate delivery date of any product, equipment or supplies the business opportunity seller is to deliver to the purchaser.