An agreement or an extended branch agreement may provide for the possibility, by means of a rider to the employment contract, of temporarily increasing the working hours laid down in the contract.
The agreement :
1° Determines the maximum number of amendments that may be concluded, up to a limit of eight per year and per employee, except in the case of replacement of a named absent employee;
2° May provide for an increase in pay for hours worked under this rider;
3° Determines the terms and conditions under which employees may benefit from additional hours as a matter of priority.
Additional hours worked beyond the duration determined by the rider give rise to an increase in pay of no less than 25%.