17. If there is a limit on the amount a donor can contribute to a political party during an election, what is the limit?

Source: Article 66, Political Parties Act 2013.

Artículo 66.- Los partidos políticos, en el año anterior a cualquier elección, podrán recibir aportaciones económicas individuales de personas naturales o jurídicas en un mismo año fiscal, hasta el tres punto cinco por ciento del presupuesto especial extraordinario de elecciones, aprobado por la Asamblea Legislativa al Tribunal Supremo Electoral, en la elección anterior del mismo tipo.

Article 66.- In the year prior to any election, political parties may receive individual financial contributions from natural or legal persons in the same fiscal year, up to 3.5 percent of the special extraordinary election budget approved by the Legislative Assembly for the Supreme Electoral Tribunal in the previous election of the same type.

Ley de Partidos: https://www.asamblea.gob.sv/sites/default/files/documents/decretos/2E597B83-D1C9-4C91-A9C9-6EC8A44FBA0F.pdf  

-The Political Parties Act has a loophole, as it only provides for limits during ordinary and pre-election periods, but not for a maximum limit per donation in an election year.
The limit in the pre-election year is up to 3.5 percent of the special extraordinary election budget for the previous election of the same type.

-In practice, for election years, the Supreme Electoral Tribunal has considered three point five percent of the special extraordinary election budget for the previous election of the same type to be the limit.