Enforcing Child Support and Relocation

I have had relocation on my mind lately. (See this post and this one and this one). I noticed the following thought it needed pointing out in the context of relocation:

IC31-16-12-12 Registration of child support order
(a) This section applies if:
(1) the parent who is entitled to receive child support; and
(2) the parent who is ordered to pay child support;
are both present in Indiana.
(b) The parent who is entitled to receive child support may register a child support order issued by another Indiana court or foreign court for the sole purpose of enforcement in accordance with IC 31-18-6-1 through IC 31-18-6-8 of the Uniform Interstate Family Support Act.

Unlike moving the entire case (see this post), this statute allows for the support enforcement in another county. The statute does not make this distinction, but it would be appear useful when only one parent has moved from the county where the child support originated.

This same statute gets duplicated somewhat at IC 31-16-13-1 ("Registration of child support order"):

If:
(1) the parent who is entitled to receive child support; and
(2) the parent who is ordered to pay child support;
are both present in Indiana, the parent who is entitled to receive child support may register a child support order issued by another Indiana court or foreign court for the sole purpose of enforcement in accordance with IC 31-18-6-1 through IC 31-18-6-8 of the Uniform Interstate Family Support Act.