There are four requirements for requesting accelerated examination under the PPH program at TIPO. These are:

a) The TW application is:

(i) an application which has validly claimed priority under §28 of the Taiwan Patent Act to the US application(s), or
(ii) an application which has validly claimed priority under §28 of the Taiwan Patent Act to the PCT application(s) without priority claim.

A TW application which has validly claimed priority to multiple US or PCT applications, or which is a divisional application validly based on the originally filed application that is included in (i) and (ii) above, is also eligible. 

b) At least one corresponding US application has one or more claims that have been determined to be patentable by the USPTO.

c) All claims on file, as originally filed or as amended, for accelerated examination under the PPH must sufficiently correspond to one or more of those claims indicated as allowable by the USPTO.

d) The applicant has been notified that a substantive examination will begin shortly and TIPO has not issued a first examination report for the application.