Okay, from what is posted here the Old Guy is getting confused again.
IF what has been posted here IS true, it seems to me that this new CASA Issued A Licence is in place of the old CASA issued MA (Maintenance Authority) which enabled you to sign for certain things you were NOT actually Licenced on.
Over the decades I had a few of those, one for example for FDRs and even one for an Engine Type, however I had a FULL Licence on those Aircraft, and I had to do the work could NOT just certify for someone else.