16. Is there a limit on the amount a donor can contribute to a political party during an election?

The only requirement is that donations recieved by poltical parties above the threshold limit are reported in the Party's election return to the Electoral Commission. Sources: Australian Election Commission Transparency Register  see https://www.aec.gov.au/Parties_and_Representatives/financial_disclosure/transparency-register/.

Disclosure threshold, see  .https://www.aec.gov.au/Parties_and_Representatives/public_funding/threshold.htm