For example, if at the time of the divorce your child is aged two years, then the financial needs of the child and the ability of the parent to pay will most likely change significantly by the time the child is 15.
(your child; is; aged two years; T:at the time of the divorce) (the financial needs of the child and the ability of the parent; will most likely change significantly; T:by the time; T:then) (the child; is; 15; T:the time)
your child the financial needs of the child and the ability of the parent the child
is will most likely change significantly is
aged two years T:at the time of the divorce
T:by the time T:then
15 T:the time