How many signatures are required to start the formal decision making stage of a direct democracy mechanism?

Political Constitution of Guatemala (Constitución Política de la República de Guatemala) (1985 with amendments in 1993)http://www.constitutionnet.org/files/Guatemala%20Constitution.pdf

Article 277.Initiative.The following have the initiative to propose amendments to the Constitution:a. The President of the Republic in the Council of Ministers;b. Ten or more deputies to the Congress of the Republic;c. The Court of Constitutionality; andd. The people through a petition addressed to the Congress of the Republic by no fewer than5,000 citizens duly listed in the Register of Citizens.In any of the cases above, the Congress of the Republic must address without delaywhatsoever the issue raised.