(2)Interest rate OTC derivative contracts can have a constant notional amount, a variable notional amount or a conditional notional amount. Contracts with a constant notional amount have a notional amount which does not vary over the life of the contract. Contracts with a variable notional amount have a notional amount that varies over the life of the contract in a predictable way. Contracts with a conditional notional amount have a notional amount which varies over the life of the contract in an unpredictable way. Conditional notional amounts add complexity to the pricing and risk management associated with interest rate OTC derivative contracts and thus to the ability of CCPs to clear them. This feature should be taken into account when defining the classes of interest rate OTC derivatives to be subject to the clearing obligation.