As an alternative to the use of standard haircuts, CBB may allow banks to use a VaR models approach to reflect the price volatility of the exposure and collateral for repo-style transactions, taking into account correlation effects between security positions. This approach would apply to repo-style transactions covered by bilateral netting agreements on a counterparty-by-counterparty basis. At the discretion of CBB, firms are also eligible to use the VaR model approach for margin lending transactions, if the transactions are covered under a bilateral master netting agreement that meets the requirements of paragraphs CA-4.3.17 and CA-4.3.18. The VaR models approach is available to banks that have received CBB's recognition for an internal market risk model under the chapter CA-14. Banks which have not received CBB's recognition for use of models under the chapter CA-14 can separately apply for CBB's recognition to use their internal VaR models for calculation of potential price volatility for repo-style transactions. Internal models will only be accepted when a bank can prove the quality of its model to CBB through the backtesting of its output using one year of historical data. Banks must meet the model validation requirement of paragraph 43 of Appendix CA-2 to use VaR for repo-style and other SFTs. In addition, other transactions similar to repo-style transactions (like prime brokerage) and that meet the requirements for repo-style transactions, are also eligible to use the VaR models approach provided the model used meets the operational requirements set forth in Section I.F of Appendix CA-2.