(a) Every charitable organization which agrees to permit a charitable sales promotion to be conducted in its behalf, shall obtain a written agreement from the commercial coventurer and submit a copy of such agreement to the department not less than ten days prior to the commencement of the charitable sales promotion within this state. An authorized representative of the charitable organization and the commercial coventurer shall sign such agreement and the terms of such agreement shall include the following: (1) The goods or services to be offered to the public; (2) the geographic area where, and the starting and final date when, such offering is to be made; (3) the manner in which the name of the charitable organization is to be used, including any representation to be made to the public as to the amount or per cent per unit of goods or services purchased or used that is to benefit the charitable organization; (4) a provision for a final accounting on a per unit basis to be given by the commercial coventurer to the charitable organization and the date when it is to be made; and (5) the date when and the manner in which the benefit is to be conferred on the charitable organization.

(b) A commercial coventurer shall keep the final accounting for each charitable sales promotion for three years after the final accounting date and such accounting shall be available to the department upon request.

(c) A commercial coventurer shall disclose in each advertisement for a charitable sales promotion the amount per unit of goods or services purchased or used that is to benefit the charitable organization or purpose. Such amount may be expressed as a dollar amount or as a percentage of the value of the goods or services purchased or used.