When a customer requests a meter test within 12 months after the date of the installation or of the last previous test of his or her meter, he or she may be required by the company to make a deposit equal to the reasonable cost of such test. The amount so deposited with the company shall be refunded or credited to the customer if the meter has a positive average error, that is, is fast, in excess of four percent, otherwise such deposit may be retained by the company. A customer may be present when the company tests his or her meter or may select an expert or other representative to be present. A written report, giving the results of such test, shall be made to the customer by the company.
30 V.S.A. § 2814