The Commission may, in particular adopt such regulations in respect of agreements, decisions or concerted practices which have as their object any of the following: ... -sharing of revenue from scheduled air services, so long as the transfer does not exceed 1 % of the poolable revenue earned on a particular route by the transferring partner, no cost are shared or accepted by the transferring partner and the transfer is made in compensation for the loss incurred by the receiving partner in scheduling flights at less busy times of the day or during less busy periods ...