cenvat credit im case of export for capital goods

if a person has paid excise duty on capital good used for producing a good which he exports,  then what will be the futher implicatiions ..  what are the rules regarding the credit relating to credit of these capital goods... for eg for inputs and input services there is rule 5 of ccr 2004 pertaining to exporting goods

in short what are the rules for cg credit , is their any refund rule , in this case ????