For the application of the provisions of articles L. 2531-2 and L. 2531-3, account is taken, as provided for in article R. 130-2 of the Social Security Code, of employees assigned within each establishment located in the Ile-de-France region, except in the following cases:
1° For employees holding an assignment contract with a temporary employment company or an employment contract concluded with an employers’ group, account is taken of the place where their assignment or activity is carried out in the Ile-de-France region;
2° For other employees who carry out their activity away from an establishment of their employer, account is taken of the place where this activity is carried out for more than three consecutive months in the Ile-de-France region.
As an exception to the provisions of the previous paragraph, employees assigned to the vehicles of road or air transport companies who carry out their activity principally outside the Ile-de-France region are excluded from the determination of the workforce used to calculate the payment intended to finance mobility services.