(IAS19.58)
Where there is a surplus of pension plan assets over obligations, an asset is recognised up to the limit of the total
of :
a) any unrecognised net actuarial losses and past service costs; and
b) the present value of any economic benefits available as refunds from the plan or reductions in future contributions to the plan (the asset ceiling).
(Revised standard IAS19.64)
When an entity has a surplus in a defined benefit plan, it shall measure the net defined benefit asset at the lower of the surplus in the defined benefit plan and the asset ceiling