Legal provisions for mandatory referendums at national level

Paraguay's Constitutionof 1992 with Amendments through 2011

https://www.constituteproject.org/constitution/Paraguay_2011

Article 290: Of theAmendment [Enmienda]

After three years ofthis Constitution having been promulgated, amendments at the initiative ofone-fourth of the legislators of any of the Chambers of the Congress, of the President of theRepublic, or of thirty thousand electors, through a signed petition[,] may berealized.

The full text of theamendment must be approved by [an] absolute majority in the Chamber of origin.[Once] it is approved, the equal treatment will be required at the reviewing Chamber.If in either of the Chambers the majority required for its approval is not met,the amendment will be considered as rejected, [and] it may not be presented againwithin the time [t?rmino] of one year.

[Once] the amendmentis approved by both Chambers of the Congress, the text will be remitted to theSuperior Tribunal of Electoral Justice to convoke a referendum, within a time periodof one-hundred and eighty days. If the result of this [referendum] isaffirmative, the amendment will be sanctioned and promulgated, incorporating itselfinto the constitutional text.

If the amendment isderogatory, another one with the same subject may not be promoted beforethree years.

The procedureindicated for amendment will not be used, but [rather] the one for reform, for thoseprovisions affecting the mode of election, the composition, the duration of [the]mandates or the attributions of any of the powers of the State, or the provisions ofChapters I, II, III and IV of Title II, of Part I.a