The plaintiff shall have the burden of proving that the sale or furnishing of the alcoholic beverage to the underage person, as defined, was, under the circumstances, negligent. Proof of the sale or furnishing of the alcoholic beverage to an underage person, as defined, without request for identification shall be admissible as evidence of negligence. Proof of good practices (including but not limited to, instruction of employees as to laws regarding the sale of  alcoholic beverages, training of employees, enforcement techniques, admonishment to patrons concerning laws regarding the purchase or furnishing of alcoholic beverages, or detention of a person’s identification documents in accordance with N.C. Gen. Stat. § 18B-129 and inquiry about the age or degree of intoxication of the person), evidence that  an underage person misrepresented his age, or that the sale or furnishing was made under duress is admissible as evidence that the permittee was not negligent. (1983, c. 435, s. 37.)