Enam Securities Pvt Ltd(”Manager to the Offer”)on behalf of KazStroService Ltd (formerly known as KazStroyService PLC) (”Acquirer”) & OGCC KazStroyService JSC , KazStroyService Holding Ltd & KazStroy Engineering (UK) Ltd (”PACs”), has issued this Corrigendum to the Public Announcement to the Shareholders of Petron Engineering Construction Ltd (”Target Company”), which is in continuation of & should be read in conjunction with the Public Announcement(”PA”) dated June 22, 2007

Revised Schedule of major Activities of the Offer

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Activity				Original Schedule		Revised Schedule
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Specified Date			June 25, 2007		June 25, 2007
Date of Opening of the Offer	August 14, 2007		June 20, 2008
Date of Closing of the Offer	September 03, 2007		July 09, 2008
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