(1)    No petroleum product imported into and received in this state or received from a manufacturer or refiner or from a marine or pipeline terminal within this state may be unloaded from its original container except as provided under sub. (5), sold, offered for sale or used until a true sample of not less than 8 ounces is taken as provided in this subchapter. This subsection does not apply if the department has previously inspected the petroleum product at the refinery, marine or pipeline terminal. Each person importing or receiving a petroleum product which has not been previously inspected shall notify the inspector in the person’s district of the receipt thereof, and the inspector shall take a sample of the petroleum product.

   (2)   If such petroleum product is received on a regular business day between the hours of 7:45 a.m. and 4:30 p.m., such notice shall be given forthwith upon receipt of such petroleum product. If received at any other time, such notice shall be given between the next succeeding hours of 7:45 a.m. and 10 a.m. of a regular business day. Provided, that if any petroleum product is received on Saturday, Sunday, or any legal holiday, designated in s. 995.20, such notice shall be given on the next following regular business day between the hours of 7:45 a.m. and 10 a.m.

   (3)   If the inspector does not, upon proper notice, after a reasonable length of time, take such sample, the recipient of such petroleum product may, in the presence of a disinterested witness, open such original container and take a true sample of not less than 8 ounces of the contents thereof. Such sample shall be immediately placed in a clean container which is in compliance with s. 168.11 (2) and (3) and tightly closed. The recipient shall record upon a label attached to such container the means of conveyance, the type of original container, the product name and quantity of the contents thereof, and such other information as the department reasonably requires for the proper identification of such shipment. Such sample thus taken shall be held for delivery, upon demand, to the inspector. After such sample is taken such petroleum product may be unloaded, sold, offered for sale or used the same as if sampled by the inspector.

   (4)   For the purpose of this section, the following shall constitute a reasonable length of time in which an inspector shall take the sample herein required: If notice is properly given to an inspector before the hour of 11:45 a.m., the inspector shall take such sample before the hour of 4:30 p.m. of the day; if notice is properly given between the hours of 11:45 a.m. and 4:30 p.m., such sample shall be taken before the hour of 11:45 a.m. of the next following regular business day. Saturdays, Sundays, and legal holidays, designated in s. 995.20, shall not be considered regular business days.

   (5)   The department may permit a recipient to unload such petroleum product prior to inspection if the recipient submits an application setting forth good and sufficient reasons, and may unload ships or boats without inspection if an emergency is declared by the coast guard. A recipient must notify the department as required by sub. (2) and the department shall revoke permission granted under this subsection if the recipient violates sub. (2).

   (6)   This section does not apply to a petroleum product that is a renewable fuel exempt under s. 78.01 (2n) from the tax under s. 78.01 (1) unless inspection is required by federal law.