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

Election Campaign Finance Act 2013 -section 14
Prohibition on contributions
(1) A candidate, a political party or a referendum committee shall not receive
any contribution or donation, in cash or in kind from the State, a State institution
or agency or any other public resource.
(2) A State, a state institution or a public officer shall not use any public resource
to—
(a) support or to campaign in support of a candidate, a political party or
a referendum committee; or
(b) support any organisation that is supporting or campaigning for a
candidate, political party or a referendum committee.

Section 2 of the Election Campaign Offences Act describes public resources to include a "corporation or a company in which the state owns a controlling interest." 
Whilst this would allow companies which the government does not own a controlling stake to support campaigns, it remains a disputed issues with some arguing that even a minority stake is sufficient to consider the entity a public body.