In case either or both of the contracting parties, not having been emancipated by a previous marriage, are between the ages of eighteen and twenty-one, they shall, in addition to the requirements of the preceding articles, exhibit to the local civil registrar, the consent to their marriage of their father, mother, surviving parent or guardian, or persons having legal charge of them, in the order mentioned. Such consent shall be manifested in writing by the interested party, who personally appears before the proper local civil registrar, or in the form of an affidavit made in the presence of two witnesses and attested before any official authorized by law to administer oaths. The personal manifestation shall be recorded in both applications for marriage license, and the affidavit, if one is executed instead, shall be attached to said applications. (61a)