10. In the courtroom of County Common Pleas Court Judge Robert Henderson, all attorneys are required to address their questions of witnesses while standing at a lectern. If the attorney wishes to hand a legal document to the witness or to the judge, he or she first must ask permission of the court. This requirement is an example of
O A. procedural law.
OB. local rules of court.
O C jurisdictional law.
D. substantive law.