"Additional child" means a child to be added to an existing support order covering another child of the same parents.
"Born of a marriage " means a child was born of a woman who was married at the time of conception, birth, or at any time during the period between conception and birth of the child pursuant to Iowa Code chapter 252A and Iowa Code section 144.13.
"Cost-of-living alteration " means a change in an existing child support order that equals an amount which is the amount of the support obligation following application of the percentage change of the consumer price index for all urban consumers. United States city average, as published in the Federal Register by the federal Department of Labor, Bureau of Labor Statistics, pursuant to Iowa Code section 252H.2.
"Guidelines " means the most current guidelines and criteria prescribed by the Iowa Supreme Court for determining the amount of child support to be awarded.
"Parent" means a person who is a responsible person or a caretaker, as those terms are defined in rule 441-95.1 (252B).
"Substantial change of circumstances, " for the purposes of this division, means:
Iowa Admin. Code r. 441-99.81