(b) Notwithstanding the provisions of paragraph (a) of this subdivision, the term "all terrain vehicle" or "ATV" shall not include any vehicle used for agricultural purposes or for snowplowing, other than for hire, provided, however, that any such vehicle shall register as an "all terrain vehicle" or "ATV" pursuant to the provisions of this article if such vehicle is used or is intended to be used for any purpose other than agricultural purposes or for snowplowing and shall be regulated in accordance with provisions governing the operation of "all terrain vehicles" or "ATV's" while in such use. 2. "Dealer" means any person engaged in the business of selling ATVs at wholesale or retail.