Overview

• National legislative elections on 26 October will use the Boleta Única de Papel, with parties in columns and offices in rows, and one mark per category.
• The electoral authority published an online simulator to practice the new ballot and clarified nullification rules such as multiple marks for the same office.
• The Cámara Nacional Electoral set a 1 September public hearing to exhibit the final ballot layout and approve party symbols, names and candidate photos.
• Provinces released local models with differences: Mendoza’s design adds colored margins, candidate photos and a lista completa option, and concurrent contests will require two ballots in two urns.
• Buenos Aires split its calendar, voting provincially on 7 September with traditional party ballots, and after complaints the national court rolled back mass polling‑place changes; separately, the provincial junta granted Fuerza Patria extra time to file lists in several municipalities.