Opposition Leader Peter Dutton pledged to install a pilot national sex offenders disclosure scheme allowing caregivers to ask police if a person has any convictions if that individual has unsupervised contact with their child.
The details would be worked through with states and territories, which are primarily in charge of handling crime and law enforcement, shadow attorney-general Michaelia Cash said.
It would apply in situations where there was unsupervised contact for at least three days within 12 months, she said.
"What it's saying to parents is you can make informed decisions about who has access to your child," Senator Cash told ABC Radio on Monday.
"But more than that, it sends a clear message to sexual predators, you have nowhere to hide."
The pilot would be modelled on a similar scheme in Western Australia, where people are under an obligation to not disseminate or publish information received through the system.
Senator Cash defended the proposal when pressed on the limitation, saying the scheme would help parents protect their children.
Labor pointed to an information-sharing register that was already in place between state and federal law enforcement officials.
Frontbencher Murray Watt described the announcement as "a bit of a cynical move from Peter Dutton on the eve of an election".
"We'll always continue to work with the states and territories to do everything we can to keep people safe," he said.
The disclosure scheme is part of a $750 million coalition package to improve community safety as it pledges a crime crackdown ahead of the May 3 election.
It's part of a plan to tackle outer-suburban seats, primarily across Sydney and Melbourne.
The coalition has also pledged extra resources for policing and intelligence agencies and strengthened laws to disrupt organised criminal syndicates.
Under Operation Safer Communities, $355 million in extra funding would go to national law enforcement authorities to crack down on illegal drugs.
"You can get some drugs off the street, you can get the thugs off the street," Senator Cash said.
Australia's screening and detection capabilities would be upgraded to help catch more drugs at the border and stop their entry into communities.
Authorities would also target the importation and distribution of date rape drugs used to spike drinks.
Crime Stoppers would also be given $7.5 million over three years to expand its operations and help protect more people from offending in local communities.
The Australian Centre to Counter Child Exploitation would have its funding doubled.
