I agree with the interpretation above, but would add the exemption:
- to complete a PLF if you travel in the flight-deck
- for mandatory hotel quarantine if travelling from a red country
…providing you are travelling for duties related to your status as a crew-member. It doesn’t just have to be operating in or out. Regulatory training duties, where they can't be completed elsewhere, also fall in to this category.
But, as always, depends who greets you on the day.
Good luck.