Lottery retailers shall display lottery point-of-sale material approved by the director in a manner which is readily seen by and available to the public. Upon request, the director may make additional point-of-sale materials available to lottery retailers at no cost or at such costs as determined by the director. Lottery retailers may use and/or display other promotional and point-of-sale material, provided, it is in accord with the image and/or theme established by the lottery, including but not limited to design, script style, color scheme, and logo; and it is consonant with the dignity of the state. The director may require removal of objectionable material and/or its use be discontinued.