54. The procedure according to which an operator, an owner of a heavy vehicle and a person who provides the services of a driver under a leasing contract is informed by a driver referred to in section 519.7 of the Code is the following:
(1) the information must be provided in writing;
(2) the writing must be signed by the driver, must indicate whether it is an amendment, a suspension or a cancellation and must give the reasons therefor;
(3) in the case of an amendment or a suspension, the writing must mention the duration thereof and, in the case of a cancellation, the duration of the period during which the driver may not obtain a licence or class of licence identical to the licence or class of licence cancelled.