26. Is there a ban on donors to political parties/candidates participating in public tender/procurement processes?

GRECO FOURTH EVALUATION ROUND Corruption prevention in respect of members of parliament, judges and prosecutors 

https://rm.coe.int/CoERMPublicCommonSearchServices/DisplayDCTMContent?documentId=09000016806dc116

Under section 10 LCI, a public servant may not, based on his/her personal interests, purchase property of a public institution entrusted to him/her; enter into transactions with a public institution in which s/he works, apart from the exceptions determined by law; enter into a transaction, as a public servant, with his/her business entity, political party or other public institution; enter into a property transaction with his/her family member or close relative as a public servant. Otherwise, there are no prohibitions or restrictions on entering into contracts with public authorities. Besides, the general legislation on public procurement is fully applicable in this context.