In PA: Make sure you read the part about refusal at the bottom...
http://law.onecle.com/pennsylvania/vehicles/00.090.019.000.html
(c) Dyed diesel fuel not to be used on public highways.--
(1) A person may not operate a motor vehicle on the public highways of this Commonwealth if the fuel supply tanks of the vehicle contain dyed diesel fuel unless permitted to do so under a Federal law or regulation relating to the use of dyed diesel fuel on the highways.
(2) A person may not sell or deliver any dyed diesel fuel knowing or having reason to know that the fuel will be consumed in a highway use. A person who dispenses dyed diesel fuel from a retail pump that is not properly labeled with the notice required by subsection (b) or who knowingly delivers dyed diesel fuel into the storage tank of such a pump shall be presumed to know the fuel will be consumed on the highway.
(d) Violations.--A person may not do any of the following:
(1) Import, export or transport within this Commonwealth diesel fuel, other than dyed diesel fuel, without the permit required under subsection (a)(1).
(2) Transport diesel fuel in this Commonwealth without the permit required under subsection (a)(1).
(3) Operate a motor vehicle on the public highways of this Commonwealth with dyed diesel fuel in the fuel supply tank except as provided in subsection (c)(1).
(4) Sell or deliver dyed diesel fuel from a retail pump unless the pump is properly labeled as required under subsection (b).
(e) Criminal penalty.--A person who violates any provision of subsection (d) commits a summary offense and shall, upon conviction, be sentenced to pay a fine of not less than $100 nor more than $2,000 or to imprisonment for not more than 90 days, or both.
(f) Civil penalty.--In addition to any penalty provided in subsection (d), a person who violates subsection (c)(1) or (2) shall be assessed a penalty of $1,000 or $10 per gallon of dyed diesel fuel involved in the sale, delivery or consumption, whichever amount is more. This amount shall be multiplied by the number of prior penalties imposed on the violator under this subsection. The resulting product shall be the penalty to be imposed.
(g) Enforcement.--
(1) Any revenue enforcement agent or other person authorized by the department may enter any place where fuels are produced or stored and may physically inspect any tank, reservoir or other container that can be used for the production, storage or transportation of diesel fuel, diesel fuel dyes or diesel fuel markers. Inspection may also be made of any equipment used for or in connection with the production, storage or transportation of diesel fuel, diesel fuel dyes or diesel fuel markers. This includes any equipment used for the dyeing or marking of diesel fuel. Books, records and other documents may be inspected to determine tax liability. An agent may detain a vehicle, vessel or railroad tank car placed on a customer's siding for use or storage for the purpose of inspecting fuel tanks or fuel storage tanks as necessary to determine the amount and composition of the fuel. An agent may take and remove samples of diesel fuel in reasonable quantities necessary to determine the composition of the fuel.
(2) A person that refuses to allow an inspection as provided in this subsection commits a summary offense and shall, upon conviction, be sentenced to pay a fine of not less than $1,000 nor more than $2,000 for each refusal.