(46)To allow for the specificities of public debt CNAV MMFs and LVNAV MMFs, they should also be permitted to use the internationally recognised amortised cost method as set out under international accounting standards adopted by the Union for certain assets. Nevertheless, for the purpose of ensuring that the difference between the constant NAV per unit or share and the NAV per unit or share is monitored at all times, public debt CNAV MMFs and LVNAV MMFs should also calculate the value of their assets on the basis of mark-to-market or mark-to-model.