Where the WO-ISA is considered a first written opinion (see point 372
), a single extension of one month for filing a reply (amendments and/or arguments under Article 34 PCT
) is in principle granted if requested before expiry of the normal time limit under Rule 54bis PCT
and on condition that the time limit so extended does not expire later than 25 months from the (earliest) priority date (see also point 380
). The extension does not apply to the time limit for filing the demand, which cannot be extended.