Luxembourg law also provides for the possibility to acquire nationality by
option, which is a separate legal concept from naturalization. Obtaining nationality by option is permitted in the following ten cases: • Adults with a parent (biological or adopted) or grandparent who is/was a Luxembourger and was unable to pass Luxembourg nationality to the person at birth (e.g. due to the nationality laws of another country forbidding it); • Parents of Luxembourg minors (requires 5 years of residency, including the 12 months prior to the option declaration, and passing both the Luxembourgish language exam and the civics course or exam); • Persons who are married to a Luxembourg citizen (requires passing both the Luxembourgish language exam and the civics course or exam; no minimum residency or marriage length requirement for spouses living in Luxembourg; 3 years of marriage required for spouses living outside Luxembourg); • Persons aged 12 or above who were born in Luxembourg and did not automatically become a citizen at birth due to neither of their parents being Luxembourg citizens or born in Luxembourg (requires 5 years of continuous residency and for at least one parent to have lived continuously in Luxembourg for at least 12 months immediately prior to the person's birth); • Adults who have completed at least 7 years' schooling in Luxembourg (requires 12 months continuous residency immediately prior to the citizenship application); • Adults who have legally resided in Luxembourg for at least 20 years (requires 12 months continuous residency immediately prior to the citizenship application and a total of 24 hours of attendance at a Luxembourgish language course, but no requirement to pass the language exam); • Adults who have fulfilled the obligations of the Welcome and Integration Contract (''Contrat d'accueil et d'intégration'') or the introductory modules of the Citizens' Pact for Intercultural Living (
Biergerpakt), a free, optional course available to any foreigner living in Luxembourg (requires 5 years residency, including 12 months continuous residency immediately before the application, and passing both the Luxembourgish language exam and the civics course or exam); • Adults who settled in Luxembourg before turning 18 (requires 5 years residency, including 12 months continuous residency before applying, and passing both the Luxembourgish language exam and the civics course or exam); • Adults who are stateless, refugees or have subsidiary protection status (requires 5 years residency, including 12 months of continuous residency, and passing both the Luxembourgish language exam and the civics course or exam); or • Volunteer soldiers who have completed one year of good and loyal service, as certified by the
Luxembourg Army's Chief of Staff. All of the options also have the same "good repute" requirements as for naturalization, i.e. the applicant must not have made any false statements in conjunction with the request for citizenship or have been issued an immediate custodial sentence of 12 months or more or a suspended custodial sentence of 24 months or more, in any country, if that sentence was not fully served within the fifteen years before the application for acquiring citizenship. Option declarations are taken before the administration of the commune of residence or, if the applicant is not resident in Luxembourg, the administration of
Luxembourg City. If the Minister of Justice does not object to and cancel the option declaration, Luxembourg nationality is acquired four months after the declaration is received by the Minister of Justice; minor children of an adult granted nationality by option are also included on the option declaration and receive nationality when their parent does. ==Recovery of citizenship==