Wis. Admin. Code § Trans 176.06
(1) The minimum limits of liability security for bodily injury and property damage liability required under this chapter are:
(a) For-hire property carriers:
(ag) For purposes of par. (a):
2. “Hazardous substance” means a material, and its mixtures or solutions, that is identified by the letter “E” in Column 1 of the Table to 49 CFR 172.101 when offered for transportation in one package, or in one transport vehicle if not packaged, and when the quantity of the material therein equals or exceeds the reportable quantity (RQ). This definition does not apply to petroleum products that are lubricants or fuels; or to a mixture or solution containing a material identified by the letter “E” in Column 1 of the Table to 49 CFR 172.101 if it is in a concentration less than that shown in the following table based on the reportable quantity (RQ) specified for the materials in Column 2 of the Table to 49 CFR 172.101:
6. “In bulk poison gas” means the transportation, as cargo, of any poison gas in any quantity.
Note: The definitions of “hazardous materials,” “hazardous substances” and “hazardous waste” in sub. (1) (ag) are taken from 49 CFR 171.8. The definitions of “In bulk,” “In bulk Class A and B explosives” and “In bulk poison gas” in (ag) are taken from 49 CFR 387.5.
(ar) For purposes of par. (a) either a combined single limit or a split limit policy is acceptable. If a split limit policy is utilized, each individual limit must meet the minimum level of coverage required.
Note: Example. For vehicles of 10,000 pounds or over transporting non-hazardous materials on July 1, 1983, and thereafter, either of the following types of policies is acceptable: a combined single limit of $750,000.00 or a split limit of $750,000.00, $750,000.00, $750,000.00. These alternatives are consistent with the interpretation of the federal rules set out in 47 Federal Register 12800, March 25, 1982.
(b) For passenger vehicles:
History: Cr. Register, November, 1977, No. 263, eff. 12-1-77; emerg. am. (1) (a) and cr. (1) (c), eff. 2-23-79; am. (1) (a) and cr. (1) (c), Register, May, 1979, No. 281, eff. 6-1-79; renum. from MVD 2.06 and cr. (1) (d), Register, February, 1981, No. 302, eff. 3-1-81; r. and recr. (1) (d), Register, April, 1982, No. 316, eff. 5-1-82; r. and recr. (1) (a), cr. (1) (ag) and (ar), r. (1) (c), renum. (1) (d) to be (2), Register, September, 1982, No. 321, eff. 10-1-82; emerg. am. (1) (a), (intro.), eff. 7-1-83; am. (1) (a) (intro.), Register, December, 1983, No. 336, eff. 1-1-84; am. (1) (a) 3. and 4., Register, January, 1984, No. 337, eff. 2-1-84; emerg. am. (1) (a) (intro.) and 1., eff. 7-1-84; am. (1) (a) (intro.) and 1., Register, December, 1984, No. 348, eff. 1-1-85.