Maintenance Requirements
The requirements should be contained in the approved Maintenance Programme, which in turn will be based on Maintenance data from the Design Approval Holder, such as a Maintenance Planning Document – see Continuing Airworthiness M.A.302(i).
I only have experience of large aircraft, so apologies if I am barking up the wrong tree.
From the CAA info, it appears that this will be the case after Dec 2019 for any aircraft operated commercially, i.e.. Flt Training.
On the other hand, if we have left EASA by then – who knows.