Well according to that extract it says "applicable to the route" or alternative route, so I would think that you wouldn't need every chart or the entire ersa.
It also doesn't say paper copy, which in 2010 electronic documents should be ok because it was published by the same authority and if u downloaded it from that authority should be accurate.
Either way I carry my iPad and as a backup there is my iPhone both have my electronic software and weather, and if they both fail, then I will have to dig around In the back seats for the paper ersa.
