Although an accused has the right to remain silent and may not be compelled to testify against himself, where an accused freely chooses to take the witness box and testify, there is no further right to silence and no general restriction on what kinds of questions they may be required to answer. Section 13 of the Canadian Charter of Rights and Freedoms guarantees that witnesses may not have any incriminating evidence they gave as testimony used against them in separate proceedings. In effect, a person can be compelled to give involuntary self-incriminating evidence, but only where that evidence is to be used against a third party.