There is a Part CAO Template provided by the CAA to download, this just requires the operators to tailor it all to their company, you can get it here, it covers most stuff.
Part-CAO Combined Airworthiness Exposition - SkyWise
c10
C10. Defects Arising During Maintenance
This section would need to be amended to reflect M.A.403 should Part-M aircraft also be managed.
All defects identified during maintenance will be recorded in the work package on an additional worksheet for investigation and correction prior to release to service of the aircraft.
Any aircraft defect that seriously endangers flight safety will be rectified before further flight.
For Part-NCO operations, the organisation managing the continuing airworthiness of the aircraft or the owner (as appropriate) will organise deferral of any defect post maintenance.
For other than Part-NCO operations, any deferral of defects post maintenance will be in accordance with the procedures of the organisation managing the continuing airworthiness of the aircraft.
D2. Minimum Equipment List (MEL) and Configuration Deviation List (CDL)
Where applicable, a deferral will only be made in accordance with the applicable MEL or CDL. Any limitations (e.g. hours / calendar / configuration) must be noted and complied with.
Where the MEL or CDL specifies maintenance actions to be performed as part of the deferral, such action will be recorded and certified prior to the deferral being made.
As defects are deferred in real time, once received, information supplied by the owner / operator will be verified by Technical Office staff against the MEL/CDL and the above as part of the process of adding the open defect to the “Live Status Report”.
This procedure should be read in conjunction with this CAE Section D7 (Defects).