R.I. Gen. Laws § 23-23-9: Operation of approved system as sufficient compliance.

Any person who shall adopt or use and who shall properly operate a system or means to prevent air pollution in compliance with an order of the director shall, as long as the approval or order remains unrevoked or unmodified, be deemed to have complied with all orders and determinations of the director issued during that period under the authority conferred upon him or her by this chapter.