Regulations under the PCT
(a) Any interested party may offer evidence that a time limit fixed in the Regulations for performing an action before the receiving Office, the International Searching Authority, the Authority specified for supplementary search, the International Preliminary Examining Authority or the International Bureau was not met due to war, revolution, civil disorder, strike, natural calamity or other like reason in the locality where the interested party resides, has his place of business or is staying, and that the relevant action was taken as soon as reasonably possible.
(b) Any such evidence shall be addressed to the Office, Authority or the International Bureau, as the case may be, not later than six months after the expiration of the time limit applicable in the given case. If such circumstances are proven to the satisfaction of the addressee, delay in meeting the time limit shall be excused.
(c) The excuse of a delay need not be taken into account by any designated or elected Office before which the applicant, at the time the decision to excuse the delay is taken, has already performed the acts referred to in Article 22 or Article 39.