In 2015, the Australian government introduced mandatory data retention laws that allows data to be retained up to two years.[4] The scheme is estimated to cost at least AU$400 million per year to implement, working out to at least $16 per user per year.[5] It will require telecommunication providers and ISPs to retain telephony, Internet and email metadata for two years, accessible without a warrant, and could possibly be used to target file sharing.[6][7] The Attorney-General has broad discretion on which agencies are allowed to access metadata, including private agencies.[8]