The company allegedly made illegal prerecorded calls on behalf of North Dakotans for Clean Water, Wildlife and Parks, a group pushing a ballot measure that would funnel some of the state's oil extraction taxes into a conservation fund. Backers of the measure want 5 percent of the state's oil extraction taxes over the next 25 years, a sum opponents said would set aside almost $5 billion during that time for conservation projects at the expense of other state needs. North Dakota law bars most organizations from making telephone sales calls to homes if the phone number is listed on a state "do not call" list. The North Dakotans for Clean Water, Wildlife and Parks is made up largely of conservation groups that include Ducks Unlimited; Pheasants Forever, The Nature Conservancy, The National Wildlife Federation, and the Audubon Society.