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

2. The campaign fund of a candidate shall be formed from:
(1) his or her personal funds;
(2) funds provided by the political party that has nominated him or her;
(3) voluntary contributions by persons having the right to elect.[…]
4. Amounts paid to accounts of campaign funds by natural and legal persons not referred to in parts 2 and 3 of this Article shall be transferred to the State Budget. Anonymous contributions made to the account of campaign funds shall also be transferred to the State Budget.
Source: Art. 26.2, 4, Electoral Code, 2016 (amended 2020)

Donations from corporations to candidates are banned.