For the past 18 years the state has offered insurance with premiums of three percent of a company’s underground payroll and one percent of surface mining payroll.

The new ruling will require the commission to make actuarial calculations each year to determine if the standard rates are proper, Associated Press reported. Plus, any new companies that subscribe to the fund will be required to buy into it.

Under the ruling, companies will need to provide information on all coal company employees to determine how much coal dust they have been exposed to that can cause pneumoconiosis.