12. Is there a ban on donations from corporations with partial government ownership to candidates?

Source Article 282, Ley N 6167/2018             
Art. 282.

 En la recaudación de fondos destinados a la campaña electoral le está absolutamente prohibido a los partidos, movimientos políticos, alianzas y concertaciones:…a) recibir contribuciones o donaciones de cualquier oficina de la administración pública, de entes descentralizados autónomos o autárquicos, de empresas de economía mixta, entidades binacionales, así como de empresas que sean concesionarias de obras o servicios públicos, o exploten juegos de azar;…
Estas mismas prohibiciones regirán para los candidatos y movimientos internos de las organizaciones políticas."  

 Unnoficial traslation: Translation (EN):
Article 282.

 In the raising of funds destined for the electoral campaign, it is absolutely prohibited for political parties, political movements, alliances and coalitions to: … (a) receive contributions or donations from any office of the public administration, from decentralized autonomous or self-governing entities, from mixed-economy companies, binational entities, as well as from companies that hold concessions for public works or public services, or that operate games of chance; …
These same prohibitions shall apply to candidates and to the internal movements of political organizations.
 

The same prohibition that applies to political parties also applies to candidates