How to delimit an absence with a "gap" period

Hi,

I need to create an absence quota and delimit the deduction period of that.

The problem is that this deduction period has a gap. The user can take his absence leave from 01/01/YEAR to 31/05/YEAR and 01/10/YEAR to 30/04/NEXT_YEAR.

On view V_T559D I just can set a sequencial deduction period.

Do you have any ideas about where to put this verification?

Thanks