10. Is there a ban on donations from corporations with government contracts to candidates?
Brazil
Art. 24. "Political parties and candidates are prohibited toreceive, either directly or indirectly, cash donations or estimated cash amounts, including by means of publicity of any kind, that originate from: [...] III - concessionaire or permittee authorized to work as a public-utility company; [...]" (Source: (Lei das Eleições No. 9.504, de 30 de setembro de 1997 (2010), (Electoral Law)))