The country is on course to become the first to introduce laws that challenge big technology firms’ dominance in the news content market, with Canada and Britain considering similar moves.
Under a global spotlight, Australian senators resumed debating the proposal already endorsed by the parliament’s lower house.
The government does not have a majority in the Senate, though the country’s opposition Labor party has said it will support the legislation despite loud protests from the tech giants.
Facebook has taken the most hardline approach amid concerns about the global precedent such laws might set for other jurisdictions.
The social media giant last week blocked all news content and several state government and emergency department accounts.
In contrast, Google has signed a series of content deals with Australian media companies.
Australia, however, has vowed no further amendments will be made and the legislation is expected to be endorsed by the country’s Senate on Tuesday. Reporting by Colin Packham; Editing by Sam Holmes