a. upon the consent and authority expressly given by the parent or guardian of such underage applicant in the presence of the authority issuing such license,

b. upon the written consent of the parent or guardian of such underage applicant executed and acknowledged in person before a judge of the district court or the court clerk of any county within the State of Oklahoma,

c. if the parent or guardian resides outside of the State of Oklahoma, upon the written consent of the parent or guardian executed before a judge or clerk of a court of record. The executed foreign consent shall be duly authenticated in the same manner as proof of documents from foreign jurisdictions,

d. if the certificate of a duly licensed medical doctor or osteopath, acknowledged in the manner provided by law for the acknowledgment of deeds, and stating that such parent or guardian is unable by reason of health or incapacity to be present in person, is presented to such licensing authority, upon the written consent of the parent or guardian, acknowledged in the same manner as the accompanying medical certificate,

e. if the parent or guardian is on active duty with the Armed Forces of the United States, upon the written permission of the parent or guardian, acknowledged in the manner provided by law for acknowledgment of deeds by military personnel authorized to administer oaths. Such permission shall be presented to the licensing authority, accompanied by a certificate executed by a commissioned officer in command of the applicant, to the effect that the parent or guardian is on active duty in the Armed Forces of the United States, or

f. upon affidavit of three (3) reputable persons stating that both parents of the minor are deceased, or mentally incompetent, or their whereabouts are unknown to the minor, and that no guardian has theretofore been appointed for the minor. The judge of the district court issuing the license may in his or her discretion consent to the marriage in the same manner as in all cases in which consent may be given by a parent or guardian.

a. in settlement of a suit for seduction or paternity, or

b. if the unmarried female is pregnant, or has given birth to an illegitimate child and at least one parent of each minor, or the guardian or custodian of such child, is present before the court and has an opportunity to present evidence in the event such parent, guardian, or custodian objects to the issuance of a marriage license. If they are not present the parent, guardian, or custodian may be given notice of the hearing at the discretion of the court.