It is rare for the personal and financial situations of spouses to remain the same in the months and years following a divorce. The ex-spouses might remarry, one ex-spouse might take a new job, or one ex-spouse might decide to move to another part of the country. At the very least, any children born to the divorced couple will experience a change of situation as they grow from childhood to adolescence and from adolescence to adulthood. Because of the fluidity of the personal situations of divorced couples and their children, it only makes sense that the law allows child support obligations to be modified as these personal situations change. This ability to modify an existing child support order is not limitless, however.