Legislative changes pushed through Parliament last month now require companies to show they have attempted to fill a position locally first before hiring overseas and give the Fair Work Ombudsman greater powers to investigate potential breaches of the visa scheme.
But technology industry bodies claimed the changes were not necessary.
"457 visa arrangements are used legitimately by the ICT sector to meet a genuine gap that currently exists between the domestic supply and demand of ICT skills," said Suzanne Campbell, chief executive of the Australian Information Industry Association.
"Allegations that the ICT sector is one of the worst offenders in what the Federal Government says is the 'overuse of 457 visas' are exactly that: allegations. To date, no data has been offered up to substantiate these claims."
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