BACK SIDE of invoice it should be print terms & Conditions-smartforms

Sap Guru's,

I have a smartform it's printing output as invoice.

Now my requirement is BACK SIDE of invoice it should be print terms & Conditions.

If i will select DUPLEX mode then it will print both sides But how can i will print terms & Conditions back side of the invoice. (Invoice have two pages)

So how can i achieve this.

Thanks in Advance.

BR

Shabareesh