(a) It shall be unlawful for any person to distribute, sell, offer for sale, purchase for the purpose of resale, or possess for the purpose of resale, any restricted pesticide unless said person shall have applied for, and been issued a commercial permit.

(b) Commercial permits may be issued by the commissioner to persons who, in the regular course of their business, purchase for the purpose of resale, distribute, offer for sale, or sell, restricted pesticides.

(c) It shall be unlawful for a commercial holder to sell restricted pesticides except to a purchase permit or commercial permit holder or except under the provisions of section 326.8(e) of this Part.

(d) Only the holder of a commercial permit may purchase restricted pesticides for resale without being required to obtain and present a purchase permit.

(e) Permits shall not be valid for more than two years.

(f) The commercial permit holder shall maintain all records pertaining to the acquisition, sale or disposal of restricted pesticides for a period of two years and shall make available said records for inspection by the commissioner. Such records shall be kept in a manner and on such forms as the commissioner may prescribe.