Sibling Art 21-13-2

• A person who has resided habitually in France since age 6, who underwent compulsory schooling exclusively in State-controlled French educational establishments, and who has a brother or sister who acquired French nationality under Art 21-7 (jus soli at majority) or Art 21-11 (anticipated jus soli declaration) may acquire French nationality by déclaration à la majorité under Art 21-13-2 Code civil.
• The declaration is available at majority (age 18). It is a one-time window; it cannot be exercised before majority and the statutory text limits it to the majority moment.
• No language requirement (B2/examen civique do not apply to this declaration route). No stage condition.
• The Government retains an Art 21-4 opposition right.

Code civil Art 21-13-2 (in force since 1 July 2016, introduced by Loi n° 2016-274 du 7 mars 2016 relative au droit des étrangers en France, art. 59; EIF 01/07/2016) [, ]:

The declarant must satisfy all of the following conditions cumulatively at the time of the declaration at majority:

Condition	Detail
Habitual residence since age 6	The declarant has resided habitually in France since the age of six
Compulsory schooling in France	The declarant has completed compulsory schooling (scolarité obligatoire) in State-controlled French educational establishments (établissements scolaires soumis au contrôle de l'État)
Qualifying sibling	The declarant has a brother or sister (frère ou sœur) who acquired French nationality under Art 21-7 (automatic jus soli at age 18) or Art 21-11 (anticipated jus soli declaration at age 16 or 13)
Timing	The declaration is subscribed at majority (age 18)

All four conditions are mandatory and non-alternative.