Mr Khan, a shopkeeper from Sunderland, was jailed for four and a half years in May 2018 for posting messages and material that was supportive of IS on social media.
He has previously served long sentences in the past for drugs supply offences.
He moved away from his hometown of Birmingham to the northeast to break away from gangs.
The emergency legislation was rushed through the Commons two weeks ago following the brutal stabbing spree of convicted terrorist Sudesh Amman in Streatham, south London.
The attack occurred just days after Amman was released from prison early.