While this does not preclude the voluntary application of any more restrictive rules and the implementation of complementary actions, decided by itself or by the most representative professional body in the value-added services sector, each electronic communications operator, within the meaning of the 6° of article L. 32 of the French Post and Electronic Communications Code, operating one or more value-added numbers, shall check the information present in the tool mentioned in the first paragraph of article L. 224-43 from the first alert and for each subsequent alert. Verification of the information present in the tool takes place within a maximum period of two working days from the day on which the electronic communications operator has been informed of an alert on a number concerning it, in accordance with article D. 224-18.