The location and method of display of permits on motor vehicles shall be prescribed by the commission. Permits shall be issued for sale in such type and design of gummed sticker that may be determined by the commission and may be procured at the central and district offices of the commission, at areas of the Nebraska state park system where commission offices are maintained, from self-service vending stations at designated park areas, from designated commission employees, from appropriate offices of county government, and from various private persons, firms, or corporations designated by the commission as permit vendors. Such county offices or private persons, firms, or corporations designated by the commission as permit vendors shall be entitled to collect and retain a fee of not less than twenty-five cents and not more than thirty-five cents, as established by the commission pursuant to section 81-814.02, for each permit as reimbursement for the clerical work of issuing the permits and remitting therefor.