13. Is there a ban on donations from any other source?

Persons employed as civil servant or officer or in the State administration, annexed budget administrations, special provincial administrations, municipalities and agencies and organizations affiliated thereto, state economic enterprises and the agencies and partnerships established by them, and in other public organisations, cannot distribute handouts.
Source: Article 62(2), Law on Basic Provisions of Elections and Voter Registers, 1961 (amended 2018)

 Acts Prohibited During the Election Period:
(a) Persons employed as civil servant or officer or in the State administration, annexed budget administrations, special provincial administrations, municipalities and agencies and organizations affiliated thereto, state economic enterprises and agencies and partnerships establihed by them as well as in other public organisations] and civil servants and officers emploeyed in associations with public utility cannot provide donation and assistance to political parties and candidates during the elections.
(b)have their servants and officers as well as all of their equipment, supplies and facilities used for the benefit and under the order of a political party or a candidate or have the same operated in any political activity.
Source: Article 63(a) and (b), Law on Basic Provisions of Elections and Voter Registry, 1961 (amended 2018)

There are limitations regarding distribution of handouts and support provided by the public institutions employees. See details in the "Source" section.