Če je pogodbena stranka organ, ki ga ureja javno pravo, ali deluje pod nadzorom takega organa, lahko pristojni organ sprejme pisno poroštvo nadzornega organa v višini odstotka iz prvega pododstavka, pri čemer se nadzorni organ obveže plačati znesek, ki ga pokriva zagotovilo, če ni mogoče ugotoviti upravičenosti do predplačila.
However, if the contractor is a body governed by public law or acts under the supervision of such a body, a written guarantee from the supervisory authority covering an amount equal to the percentage specified in the first subparagraph may be accepted by the competent body, provided that the supervisory authority undertakes to pay the amount covered by the guarantee should entitlement to the advance paid not be established.