37 C.F.R. § 1.69
(b) Unless the text of any oath or declaration in a language other than English is in a form provided by the Patent and Trademark Office or in accordance with PCT Rule 4.17(iv), it must be accompanied by an English translation together with a statement that the translation is accurate, except that in the case of an oath or declaration filed under § 1.63, the translation may be filed in the Office no later than two months from the date applicant is notified to file the translation.
(35 U.S.C. 6, Pub. L. 97-247)
[42 FR 5594, Jan. 28, 1977, as amended at 48 FR 2711, Jan. 20, 1983; 62 FR 53189, Oct. 10, 1997; 69 FR 56540, Sept. 21, 2004; 70 FR 3890, Jan. 27, 2005]