(a) At the time of marriage the parties shall be at least sixteen (16) years of age except as otherwise provided. (b) All marriages involving a person under sixteen (16) years of age are prohibited and voidable, unless before contracting the marriage a judge of a court of record in Wyoming approves the marriage and authorizes the county clerk to issue a license therefor. (c) When either party is a minor, no license shall be granted without the verbal consent, if present, and written consent, if absent, of the father, mother, guardian or person having the care and control of the minor. Written consent shall be proved by the testimony of at least one (1) competent witness.