The Board shall establish by regulation a procedure for selling bonus deer permits. Each bonus deer permit purchased shall entitle the holder thereof to take additional deer under conditions prescribed by the Board. The cost of a bonus deer permit shall be set by the Board but shall not exceed the fee charged for the special license to hunt bear, deer and turkey, as prescribed under § 29.1-305. Clerks and license agents who sell hunting licenses shall sell bonus deer permits and shall be entitled to a service fee as prescribed in § 29.1-332.