R.I. Gen. Laws § 21-4.1-8: Preference.

Notwithstanding any provisions to the contrary contained in chapter 2 of title 37 or in any city or town charter or ordinance, any Rhode Island milk processor or distributor which bids on any state, city, town, or regional school district contract for the purchase of milk within this state shall be entitled to and shall be given a percentage preference of one quarter of one percent (0.25%) over any out-of-state milk provider or distributor bidding on the same contract.