Ancestry has an index record in
Victoria, Australia, Marriage Index, 1837-1950
Regd Percy Rippon spouse Hewitt, but It is in a higher subscription than I have, so I can't access further details
The database is https://www.ancestry.com.au/search/coll ... gerecords/
You can purchase the original record from Births, Deaths, and Marriages, Victoria
The birth index for Victoria on Ancestry only goes to 1917.
On the website Births, Deaths, and Marriages, Victoria you can't search for births within 100 yearshttps://www.bdm.vic.gov.au/research-and ... ly-history
The search wasn't opening when I tried it, so I couldn't see when the marriage took place.
For NSW you are required to provide information for searching births within 100 years.https://www.bdm.nsw.gov.au/Pages/family ... h-nsw.aspx
This link is about Electoral rollshttps://www.nla.gov.au/research-guides/ ... oral-rolls
Given what is said in the link, I would be surprised if there is any information available online, but I don't know.
Although I live in Australia, I haven't done much searching in Australian records, so can't offer much advice