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

"Every political party is entitled to accept contribution offered to it by any person or company voluntarily, other than a Government company."

Source:  Section 29B, Representation of the People Act, 1951

"For the purposes of this Act , Government company means any company in which not less than
fifty-one per cent of the paid-up share capital is held by the Central Government, or by any State
Government or Governments, or partly by the Central Government and partly by one or more
State Governments and includes a company which is a subsidiary of a Government company as
thus defined."

Source: The Companies Act, 2013