(4)A first category should include both financial and non-financial counterparties which, on the date of entry into force of this Regulation, are clearing members of at least one of the relevant CCPs and for at least one of the classes of credit OTC derivatives subject to the clearing obligation, as those counterparties already have experience with voluntary clearing and have already established the connections with those CCPs to clear at least one of those classes. Non-financial counterparties that are clearing members should also be included in this first category as their experience and preparation towards central clearing is comparable with that of financial counterparties included in it.