In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Perjury in American law comes from the common law of England , which defined the it as giving a false testimony under oath that has to do with the issue .
Perjury operates in American law as an inherited principle of the common law of England , which defined the act as the " willful and corrupt giving , upon a lawful oath , or in any form allowed by law to be substituted for an oath , in a judicial proceeding or course of justice , of a false testimony material to the issue or matter of inquiry . "