In a letter to Cricket South Africa (CSA), the ICC confirmed that Botha could now resume bowling at international level.
The permission, however, has been granted on the condition that he uses the action, which was cleared earlier this month.
After forwarding the report on Bothas bowling action to CSA, ICC General Manager Cricket David Richardson said, ''The findings of the report mean that Johan can resume bowling in international cricket.
However, everyone needs to be aware that no bowler is ever 'cleared' as they could simply revert to bad habits.''
''All bowlers are subject to further reporting if the match officials are of the view that they have concerns about whether a delivery or deliveries conform to the Laws of Cricket when observed with the naked eye,'' he added.
Botha was suspended from bowling in international cricket in February this year after he was reported for having a suspect bowling action during the third Test against Australia in Sydney the previous month.
Botha rectified his action under the supervision of the Cricket South Africa and applied for an independent reassessment of his bowling action in August.
The reassessment was carried out at the University of Chichester in the UK by Dr Paul Hurrion but the action still exceeded ICC tolerance levels. As a result the suspension from bowling in international cricket remained in place.
After further remedial work Botha submitted to another reassessment earlier this month at the University of Western Australia under the supervision of Professor Bruce Elliott.
Professor Elliotts report concluded that improvements had been made to the bowling action for both the off-break and 'doosra' and the off-spinner was capable of bowling within ICC levels of tolerance.
CSA were, however, reminded that should he bowl with an action that employs any delivery that is considered by the match officials to be above the levels of tolerance, there is a possibility he will be reported again and may even be called.
In such a situation, Botha would have to submit to a further independent analysis of his action and if that analysis finds his action to be outside the prescribed 15 degree level of tolerance he would again be suspended.