Any such physician or surgeon may perform a surgical interruption of vas deferens or Fallopian tubes upon any unmarried person under the age of 18 years when so requested in writing by such? minor and in accordance with the conditions and requirements set forth in N.C. Gen. Stat. § 90-271, provided that the juvenile court of the county wherein such minor resides, upon petition of the parent or parents, if they be living, or the guardian or next friend of such minor, shall determine that the operation is in the best interest of such minor and shall enter an order authorizing the physician or surgeon to perform such operation. (1963, c. 600; 1971, c. 1231, s. 1.)