The consent of a married minor or, if a married minor be unable to give consent by reason of physical disability, then the consent of the spouse of the married minor to the performance by any licensed medical, surgical or dental practitioners, or any hospital, or their agents or employees, of any lawful diagnostic, therapeutic surgical or postmortem procedure upon or in respect to such minor or any minor child of such minor, shall, notwithstanding the minority of such minor, be valid and legally effective for all purposes and shall be binding upon such minor, his parents, spouse, heirs, executors and administrators as effectively as if such minor or the spouse of such minor were eighteen years of age.