15. If there is a limit on the amount a donor can contribute to a political party during a non-election specific period, what is the limit?

Article 26, para 4, 4¹, 5 of the Law on Politial Parties 
of 21.11.1997 (as of 03.05.2018)

https://bit.ly/2NlIQi1 

There is a ceiling on donations from legal persons (businesses, corporates) to political persons of 400 average salaries in that fiscal year or 120 000 EUR and a ceiling on donations from natural persons of 200 average salaries in that fiscal year or 60 000 EUR.  1 average salary in Moldova for 2018 is  6 150 MDL = 300 EUR.

4) 1 A natural person may, within one budget year, make cash donations to one or more political parties in the amount of up to 3 average economic salaries established for that year. Donations exceeding this limit will be made exclusively through bank operations.