At which stage legality check is conducted?

CONSTITUTIONOF THE SLOVAK REPUBLIC

(Adopted 1992; lastamended 2006)

http://www.nrsr.sk/web/default.aspx?SectionId=124

Chapter5: Legislative Power

Part2: The Referendum

Article 95

(1) The referendumis called by the President of the Slovak Republic if requested by a petitionsigned by a minimum of 350,000 citizens, or on the basis of a resolution of theNational Council of the Slovak Republic, within 30 days after the receipt ofthe citizens' petition, or the resolution of the National Council of the SlovakRepublic.

(2) ThePresident of the Slovak Republic may, before calling a referendum, file withthe Constitutional Court of the Slovak Republic a petition for a decisionwhether the subject of the referendum, which should be called on the basis of acitizens’ petition or a resolution of the National Council of the SlovakRepublic pursuant to paragraph 1, is in compliance with the Constitution or aconstitutional law…

REFERENDUM LAW

(Adopted 1992; last amended 2011)

http://www.minv.sk/?referendum

Article1

(3) Ak sa m?referendum vyhl?siť na z?klade pet?cie, postupuje sa pri v?kone petičn?ho pr?vapodľa tohto z?kona a podľa osobitn?ho z?kona. S pet?ciou, ktor? žiadavyhl?senie referenda, sa občania obracaj? na prezidenta Slovenskej republiky.

Article 1c

(1) Prezidentrepubliky presk?ma, či pet?cia svoj?m obsahom zodpoved? ?stave aosobitn?mu z?konu a či m? predp?san? n?ležitosti.

(2) Akpodmienky uveden? v odseku 1 neboli splnen?, prezident republiky vyhl?seniereferenda odmietne. O svojom rozhodnut? informuje z?stupcu petičn?ho v?boru.