Sec. 3k. The word "oath" shall be construed to include the word "affirmation" in all cases where by law an affirmation may be substituted for an oath; and in like cases the word "sworn" shall be construed to include the word "affirmed".
“Oath” and “sworn” defined.
Mich. Comp. Laws § 8.3k, under Revised Statutes of 1846.
Mich. Comp. Laws § 8.3k