Article A743-18 of the French Commercial code
I.-The travel expenses mentioned in a of 5° of I of article Annex 4-8 shall be reimbursed at a flat rate for the distance travelled on both the outward and return journeys, equal to the price of: 1° 1st class carriage in the mode of transport concerned, if the journey can be made by rail or by another public transport service; 2° 1st class carriage by rail, based on the…