Nav attr in Reporting

Hi,

I want to use some nav.attributes of an infoobject present in cube in reporting.I know that I have to enable this nav.attribute for reporting in infoprovider...

My dataflow is Datasource->DSO->Infocube-->Multiprovider and this infoobject is there at all levels in this dataflow...Do I have to enable this nav.attribute for reporting in all objects or ois it ok just to enable only at multiprovider level?

Thanks....