The organiser or retailer may not, before the start of the journey or holiday, unilaterally alter the terms of the contract other than the price in accordance witharticle L. 211-12, unless:
1° The organiser or retailer has reserved this right in the contract;
2° The alteration is minor; and
3° The organiser or retailer informs the traveller in a clear, comprehensible and visible manner on a durable medium.
When, prior to departure, compliance with one of the essential elements of the contract is rendered impossible as a result of an event outside the organiser’s or retailer’s control, the organiser or retailer must inform the traveller of this as soon as possible and inform the traveller of the option available to him either to cancel the contract without charge or to accept the change proposed by the organiser or retailer.