I think in this case it implies a valid chart as opposed to one that has become invalid due to changes or an absence of information on it. There is nothing to prevent the owner updating a chart by adding changes to information or additional information thus making it "current". In the RAF we often made our own charts when there was no current chart available.
Having spent most of my flying career using ONC JNC OPC TPC etc, some of those are grossly out of date. I recall going to Moscow Vnukovo only to find it incorrectly plotted on the chart by several miles.