What is the official guidance for my case? Do you know a website on whose information I can really rely on?
These are the main French official websites dealing with this:
- Covid travel bans and other rules on service-public.fr. Service-public.fr is managed by the Prime Minister's office and offers generally high quality information (legally sound, precise and relatively readable) but is not always the first to be updated.
- Movement and travel from the government's special Coronavirus website. Gouvernement.fr is also managed by the Prime Minister's office but was mostly a PR website before Covid.
- International travel page on the Interior ministry's web page (direct links to specific pages on gouvernement.fr). The Interior ministry is in charge of enforcing the rules.
- Coronavirus info from the ministry of Foreign Affairs. This ministry and individual embassies publish more information in English but I often find it confusing or imprecise.
The rules changed today (February 12), a test is not required anymore if you received a full vaccination course (more on that below). Otherwise, there are restrictions based on the purpose of travel, mandatory tests before and after entry, and a quarantine recommendation.
The Interior ministry's website also offers more details on what “vaccinated” means:
- “Vaccinated” should be understood as defined in EU law (“au sens de la réglementation européenne”) and can differ from the definition used for the pass vaccinal.
- Since February 1st, a booster is required for everybody whose last injection is more than 9 months old.
What is de facto happening at the airport when entering, are checks being made? How strict are they? From my past travel experience in the pandemic I know that it can be quite a wide gap between official recommendations and the (non-)verification of COVID certificates of individuals at the border.
I have not been flying frequently enough to offer anything but anecdotes but I did encounter very systematic checks at Charles-de-Gaulle airport recently (a little over a month ago), even coming from another Schengen country. The checks were performed by the police, who did ask about the original point of departure (as many people including myself were merely transiting through the other Schengen airport).
IIRC, they scanned the EU Digital covid certificate (proof of vaccination) but did not ask for the proof of a recent test (the country I was coming from has been moving in and out of the green list over the last months). For international travel, I strongly recommend having some human-readable proof of vaccination (e.g. the full A4 readout of the relevant data, not merely the QR code) as many check points require more data and are not setup to scan the QR code.
I suspect that in theory it is up to the airline to check you have some proof of a negative test before letting you board (but it has also been hit and miss).
Incidentally, a valid EU digital covid certificate (so a recent vaccination) is in fact required on international trains but this hasn't been checked by anyone in over a year (and I take the Thalys once a month at least).