The mode of and procedure for arguing or otherwise litigating appeals in criminal cases are determined by rules of the individual appellate courts. Among the matters to be determined by such court rules are the circumstances in which oral argument is required and those in which the case may be submitted by either or both parties without oral argument; the consequences or effect of failure to present oral argument when such is required; the amount of time for oral argument allowed to each party; and the number of counsel entitled to be heard.
New York Legal Code