The specifications of those stamps are laid down in the Schengen Executive Committee Decision SCH/COM-EX (94) 16 rev and SCH/Gem-Handb (93) 15 (CONFIDENTIAL).
Leagtar síos mionsonraí na stampaí sin sa Chinneadh ó Choiste Feidhmiúcháin Schengen SCH/COM-EX (94) 16 rev agus SCH/Gem-Handb (93) 15 (RÚNDA).