(18)Rules governing the calculation of the counterparty default risk module, including the risk-mitigating effect of derivatives, reinsurance arrangements or insurance securitisation can prove to be very complex. Such complex calculations may not always be commensurate to the nature, scale, and complexity of the risks of an insurance or reinsurance undertaking. Therefore, to reduce compliance costs for smaller undertakings, an additional simplified calculation of the risk-mitigating effect of derivatives, reinsurance arrangements or securitisation should be introduced.