The pacer, whose five-year ban officially expires on September 2 this year, was informed by the ICC that he can resume playing domestic cricket immediately but can only return to international arena only after completion of ban.
"Today is the happiest day of my life and I have learnt my lesson. I promise to comeback as not only a better cricketer but also as a better person," Aamir, serving a five-year ban, told PTI.
Aamir who played 14 Tests, 15 ODIs and 18 T20 matches before being banned from cricket in September 2010, also said that every player who has served a punishment period deserved another chance to redeem himself.
"I am happy the authorities have given me a chance to redeem and rehabilitate myself. I want to show everyone what I have learnt from what have been the worst five years of my life," he said.
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With the first class matches in Pakistan over this season Aamir will only have the option of either playing the non-first class Grade two tournament or in the super eight T20 event after the World Cup.
Asked about his detractors who were not in favour of him returning to the cricket field, Aamir said everyone has ate right to have an opinion.
"But they must understand that I have apologized for my actions and I deserve a chance. I will answer them with my behavior and performance on the field," he added.
The decision to let Amir play domestic cricket was made following the ICC board meeting in Dubai on January 28 and after the ICC Anti-Corruption and Security Unit (ACSU) officials met with Aamir last week.
Aamir also said his wife has supported him tremendously and had helped me through everything and added he would be having a official wedding ceremony soon.