(19)In determining which classes of OTC derivative contracts are to be subject to the clearing obligation, due account should be taken of the specific nature of the relevant classes of OTC derivative contracts. The predominant risk for transactions in some classes of OTC derivative contracts may relate to settlement risk, which is addressed through separate infrastructure arrangements, and may distinguish certain classes of OTC derivative contracts (such as foreign exchange) from other classes. CCP clearing specifically addresses counterparty credit risk, and may not be the optimal solution for dealing with settlement risk. The regime for such contracts should rely, in particular, on preliminary international convergence and mutual recognition of the relevant infrastructure.