The following are required to file your petition: ! Parents must financially support their child until the child turns 21 years old or is emancipated.A spouse can file a petition in New York Family Court for the other spouse to pay spousal support even if they have not yet filed for divorce. Divorce Lawyers Nassau County specializes in Child Custody, Alimony payments, Asset Division and Child Visitation. We'll fight for custody! Mr. Darren M. Shapiro, Esq. Helps his clients to manage from his office in Nassau County, have to do with matters of divorce. Please note that the calculations provided in the stated chart intervals are based upon the lower bound of the interval. Nassau County law requires all parents to support their children financially. During a divorce, either spouse has the right to petition for spousal support, also known as alimony or spousal maintenance.