16.1 This contract may Si modified prior a formal Bref by LYCA Mouvant to the customer within one (1) month in advance par; MMS; SMS, e-Correspondance or other available means, when there is a permutation in the Faveur, its Clause and approprié regulations, pépite a permutation in the market. 2.8 https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616