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         Canada Evidence Act
            PART I
               Oaths and Solemn Affirmations

Witness whose capacity is in question

16. (1) If a proposed witness is a person of fourteen years of age or older whose mental capacity is challenged, the court shall, before permitting the person to give evidence, conduct an inquiry to determine

(a) whether the person understands the nature of an oath or a solemn affirmation; and

(b) whether the person is able to communicate the evidence.

Testimony under oath or solemn affirmation

(2) A person referred to in subsection (1) who understands the nature of an oath or a solemn affirmation and is able to communicate the evidence shall testify under oath or solemn affirmation.

Testimony on promise to tell truth

(3) A person referred to in subsection (1) who does not understand the nature of an oath or a solemn affirmation but is able to communicate the evidence may, notwithstanding any provision of any Act requiring an oath or a solemn affirmation, testify on promising to tell the truth.

Inability to testify

(4) A person referred to in subsection (1) who neither understands the nature of an oath or a solemn affirmation nor is able to communicate the evidence shall not testify.

Burden as to capacity of witness

(5) A party who challenges the mental capacity of a proposed witness of fourteen years of age or more has the burden of satisfying the court that there is an issue as to the capacity of the proposed witness to testify under an oath or a solemn affirmation.

R.S., 1985, c. C-5, s. 16; R.S., 1985, c. 19 (3rd Supp.), s. 18; 1994, c. 44, s. 89; 2005, c. 32, s. 26.