Revise the petroleum storage tank cleanup eligibility requirements

This bill updates Montana's petroleum storage tank cleanup fund to clarify which costs are eligible for reimbursement and extends the authority for the state board to create rules about the program. It directly affects owners and operators of petroleum storage tanks who seek financial assistance from the state fund to address spills and cleanup efforts. The bill specifies that eligible costs include corrective action expenses and compensation for third-party injuries or property damage, while excluding penalties, legal fees, and costs for equipment repair. It also adjusts reimbursement percentages and maximum dollar limits for different types of tanks and release dates, including a new effective date for these changes.