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

"No one shall contribute or receive any political funds in connection with any of the following acts: (...) 4. Acquiring any right, interest or position on or in property, or arranging the acquisition thereof through any contract or any disposition with any of the following corporations: (a) A corporation that is created by the State, public organizations or pursuant to the provisions of any special Act; (b) A corporation whose majority shares and stake are owned by the State or any local government; (c) A corporation that receives directly or indirectly subsidies from the State or public organizations; (d) A corporation in which the Government invests or for which the Government offers a payment guarantee.
Article 32, Political Funds Act, 2023"

There is a ban.