18. Is there a limit on the amount a donor can contribute to a candidate?

Artículo 2 - "Los partidos son instrumentos necesarios para la formulación y realización de la política nacional. Les incumbe, en forma exclusiva, la nominación de candidatos para cargos públicos electivos."

Source: Article 2, Law 23.298: Ley Orgánica de los Partidos Políticos, 1985

Individual candidates are not allowed to participate in elections, only through political parties. In this sense, parties are the only actor allowed to receive funds and report for their expenses.