Nov 9 (Reuters) - Macmahon Holdings Ltd MAH.AX :
* Notice of court proceedings MAH.AX
* Macmahon rejects basis for class action
* Says quantum of the claim has not been specified
* Says allegations relate to disclosures by Macmahon in 2012 regarding the company's hope downs 4 contract
* Today been served with shareholder class action filed in federal court of Australia by aca lawyers on behalf of a shareholders
* Says Macmahon will vigorously defend the proceeding
* Source text for Eikon ID:nASX5MPsBl
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