1. An air carrier's flight plan may be rejected by the competent Air Traffic Management authorities if the air carrier intends to land or take off at a coordinated airport, during the periods for which it is coordinated, without having a slot allocated by the coordinator.
2. The coordinator shall withdraw the series of slots provisionally allocated to an air carrier in the process of establishing itself and place them in the pool on 31 January for the following summer season or on 31 August for the following winter season if the undertaking does not hold an operating licence or equivalent on that date or if it is not stated by the competent licensing authority that it is likely that an operating licence or equivalent will be issued before the relevant scheduling period commences.
3. The coordinator shall withdraw and place in the pool the series of slots of an air carrier, which it has received following an exchange pursuant to Article 8a(1)(c) if they have not been used as intended.
4. Air carriers that repeatedly and intentionally operate air services at a time significantly different from the allocated slot as part of a series of slots or uses slots in a significantly different way from that indicated at the time of allocation and thereby cause prejudice to airport or air traffic operations shall lose their status as referred to in Article 8(2). The coordinator may decide to withdraw from that air carrier the series of slots in question for the remainder of the scheduling period and place them in the pool after having heard the air carrier concerned and after issuing a single warning.
[F25. Member States shall ensure that effective, proportionate and dissuasive sanctions or equivalent measures are available to deal with repeated and intentional operation of air services at times significantly different from the allocated slots or with the use of slots in a significantly different way from that indicated at the time of allocation, where this causes prejudice to airport or air traffic operations.]
6. (a) Without prejudice to Article 10(4), if the 80 % usage rate as defined in Article 8(2) cannot be achieved by an air carrier, the coordinator may decide to withdraw from that air carrier the series of slots in question for the remainder of the scheduling period and place them in the pool after having heard the air carrier concerned.
(b) Without prejudice to Article 10(4), if after an allotted time corresponding to 20 % of the period of the series validity no slots of that series of slots have been used, the coordinator shall place the series of slots in question in the pool for the remainder of the scheduling period, after having heard the air carrier concerned.]