Don't quite understand what is, and how it get started, There's no requirement for annual service for a Perazzi.
The term "annual service" was an old British tradition, for their fine English game guns under severe weather condition to prevent rust and wood swelling.
Perazzi was designed to withstand heavy usage and easy owner maintenance, if you know how to take the stock and trigger off the gun, you can see everything of the gun, change the springs is all you need to learn to service the gun until it gets loose for a new locking bolt.