In force since Oct 18, 2024
Single Paper Ballot: one ballot for everyone
Ley 27.781
in forceNATIONALApplies the same nationwide
State, institutions and security
Ley 27.781 writes the Single Paper Ballot into the Electoral Code: one ballot listing every party in each national election.
The other rules on this subject27
Royalties are shared by population, not by where the field isLey provincial 2148 (enacted on 15-Nov-1995)in force
Private property: expropriation costs more and eviction speeds up (half-sanctioned)Bill PE-13/2026 (Mensaje 22/26) — first-round approval in the Senate; now in the Chamber of Deputies (file 0032-S-2026)pending
What changed and who it applies to
What changed
Ley 27.781 adds a new Chapter IV (Title III) to the National Electoral Code (Ley 19.945) that replaces the system of multiple party ballots with the Single Paper Ballot as the voting instrument for all national electoral processes. Art. 62 establishes the BUP; art. 62 bis sets the content (categories, groupings, candidate names and photos, boxes to vote); art. 62 ter sets the design (non-transparent paper, district/circuit identification, standardized printing); art. 63 orders its approval in a public hearing at least 45 days before the election; and art. 63 bis regulates ballot alignment for homonymous groupings and alliances. verif Oct 18, 2024 ↗
In force
Enacted on October 1, 2024 and published in the Official Gazette on October 18, 2024 (notice 315713). Its first effective application was in the national legislative elections of October 26, 2025; that fact does not appear in the Official Gazette notice (it postdates the rule) and rests on a separate official source (Electoral Observatory, argentina.gob.ar). verif Oct 18, 2024 ↗
Who it applies to
All national electoral processes: Argentine voters, political groupings and alliances (ballot-presentation requirements), the National Electoral Chamber and federal judges with electoral jurisdiction (design and approval), electoral boards (district implementation) and the Executive Branch (printing and distribution). verif Oct 18, 2024 ↗
The norm
Ley 27.781 - 'Modificación de la Ley N° 19.945. Boleta Única Papel' (amendment to Ley 19.945, single paper ballot), which amends the National Electoral Code (Ley 19.945). verif Oct 1, 2024 ↗
Our reading
The Single Paper Ballot is institutional transparency made law: a single official ballot simplifies electoral logistics and eliminates problems of the multiple-ballot system, in line with rule R3 (clear rules and predictability). It debuted in the October 2025 elections, so it went from rule to practice. What would test it is implementation quality in each district, not the rule itself. thesis
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