21. Is there a limit on in-kind donations to political parties?

The Australian Electoral Commision requires that the annual returns for organisations and and individual donars must disclose details of donations, including gifts -in-kind made to poltical parties totalling more than the disclosure threshold for donations. 

Source: Australian Electoral Commission, Financial Disclosure Overview,  https://www.aec.gov.au/Parties_and_Representatives/financial_disclosure/Overview.htm