Post-employment benefit plans are classified as “defined contribution” plans if the Group pays fixed contributions into a separate fund or to a third party financial institution and has no further legal or constructive obligation to pay further contributions. Therefore no assets or liabilities are recognized in the Group statement of financial position in respect of such plans, apart from regular prepayments and accruals of contributions. For the Belgian defined contribution plans, UCB is required by law to guarantee a minimum return on employee and employer contributions. As a consequence, these plans are considered defined benefit plans. Where reliable estimates can be made for material plans, they are valued using the projected unit credit method under IAS 19. These plans are aggregated with the results for other defined benefit plans.