1. The home Member State shall ensure that IORPs operating occupational pension schemes establish at all times in respect of the total range of their pension schemes an adequate amount of liabilities corresponding to the financial commitments which arise out of their portfolio of existing pension contracts.

2. The home Member State shall ensure that IORPs operating occupational pension schemes, where they provide cover against biometric risks or guarantee either an investment performance or a given level of benefits, establish sufficient technical provisions in respect of the total range of such schemes.

3. The calculation of technical provisions shall take place every year. However, the home Member State may allow a calculation once every three years if the IORP provides members or the competent authorities with a certification or a report of adjustments for the intervening years. The certification or the report shall reflect the adjusted development of the technical provisions and changes in risks covered.

4. The calculation of the technical provisions shall be executed and certified by an actuary or by another specialist in that field, including an auditor, where permitted by national law, on the basis of actuarial methods recognised by the competent authorities of the home Member State, according to the following principles: