Males above twenty but under twenty-five years of age, or females above eighteen but under twenty-three years of age, shall be obliged to ask their parents or guardian for advice upon the intended marriage. If they do not obtain such advice, or if it be unfavorable, the marriage shall not take place till after three months following the completion of the publication of the application for marriage license. A sworn statement by the contracting parties to the effect that such advice has been sought, together with the written advice given, if any, shall accompany the application for marriage license. Should the parents or guardian refuse to give any advice, this fact shall be stated in the sworn declaration. (n)