Child support obligation of an incarcerated parent.

Specifies that, in the absence of other changing circumstances, incarceration is not presumed to constitute a change in circumstances so substantial and continuing as to make the terms of a child support order unreasonable. Specifies that the burden is upon the party seeking a modification of the child support order to show that a party's incarceration is a changed circumstance so substantial and continuing as to make the terms of the order unreasonable.