Civil marriage in Singapore runs on the Women's Charter 1961, administered by the Registry of Marriages (ROM). Section 17 fixes the position on age: a marriage solemnised between persons where either is below the age of 18 at the date of solemnisation is void, unless the Minister has authorised it through a Special Marriage Licence. That single rule creates the two brackets that govern this document. Where a party is 18 or above but below 21 and has not previously been married, section 9 requires that the consent of the appropriate person named in the Second Schedule be given in writing, or, failing that, the consent of the High Court. The Registrar will not issue the marriage licence without it.
The Second Schedule sets out who the "appropriate person" is, working through a defined order: the father, then the mother, then a lawful guardian, and further categories where a parent is deceased, of unsound mind, or absent from Singapore. This hierarchy matters in practice, because a consent signed by the wrong relative is not valid consent, and a solemniser who accepts it exposes the marriage to challenge. Where the appropriate person refuses, is unavailable, or cannot be traced, section 9 allows the High Court to grant consent in place of that person, and the Family Justice Courts hear such applications.
For couples where a party is below 18, written parental consent is still required but is layered under the Special Marriage Licence process. The Ministry of Social and Family Development, through ROM, runs a Social Assessment Interview and a compulsory marriage preparation programme, and the Minister's approval must be obtained before solemnisation. The Registry of Marriages sets out the current documentary and procedural requirements on its official portal, and you should read them alongside the statute at the Registry of Marriages guidance on marriage involving minors. Muslim marriages fall outside this entirely: they are governed by the Administration of Muslim Law Act 1966, administered by the Registry of Muslim Marriages, which now sets its own minimum age of 18 with wali and kadi requirements that a Women's Charter consent does not satisfy.