Does a retroactive increase in child support apply in circumstances where the payor's income has been reduced?

As explained in Brown v. Brown, supra, the factors that required weighing and assessing for purposes of determining whether there should be a retroactive increase (as conducted above) do not apply in circumstances where the question is whether the payor is entitled to a retroactive decrease in child support. The real question here is whether there has been a reduction in the income upon which the child support order was originally made.