The examinations are available in three varieties: "DELF Prim" which is for Primary school students (only available at A1 level), "DELF Junior et Scolaire" which is aimed at secondary-school aged students and "DELF Tous Publics" which is aimed at adults. Each variety is worth exactly the same and results in the awarding of the same diploma, but the material is varied to ensure that it is appropriate for the target cohort. DELF certificates are valid for life and do not expire.[1]