The duo along with paceman Mohammad Amir was banned in 2011 over a spot-fixing case which shook the cricket world when it was revealed by the now defunct British tabloid News of the World in August 2010.
The trio along with their agent Mazhar Majeed arranged deliberate no-balls during the Lord’s Test against England in 2010 in return for money in a deal with an undercover reporter of the tabloid.
The ICC said both Butt and Asif have completed their rehabilitation.
“Both are eligible to play in domestic and international levels, on 2 September 2015 after fulfilling the specific conditions laid down by the independent Anti-Corruption Tribunal,” the ICC said in a press release.
Amir’s five-year ban was relaxed in January this year after the ICC amended its anti-corruption code, which allowed him to play domestic cricket in Pakistan six months before his ban expired.
Butt received a five-year suspended suspension and Asif two.