OBS_VALUE: Regulation (EU) 2021/250 amended Article 8a, para.3 in the following way: (c) Slots allocated to a new entrant as defined in Article 2(b) may not be exchanged as provided for in paragraph 1(c) of this Article for a period of two equivalent scheduling periods, except in order to improve the slot timings for these services in relation to the timings initially requested.