The tiered system encourages continued investment in the state's oil and gas fields, said Tim Wigley, president of OIPA.
"It's disheartening at times to be demonized the way we have been...," said Tim Wigley, head of the Oklahoma Independent Petroleum Association trade group. "Oklahoma's economy is based on whether rigs are up and running. When they are, the state does great and people buy more trucks buy more homes. When they're not, the state suffers. It's always been that way."