3. Is there a ban on corporate donations to political parties?

The Transparency, Supervision, and Financing of Parliament (Majles) Election Activities Law (Art. 65(8) note 2)

Law amended, January 12, 2020 Reference: https://perma.cc/DJD4-P8WR

Legal entities, except for political parties and groups, and charitable organizations and endowments, are prohibited from directly or indirectly contributing to electoral activities under any title. Whether in the form of cash or non-cash donations, or providing property, services or other direct or indirect benefits at a lower price than their normal price for candidates or for campaigning and propaganda purposes.