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Guide for applicants, Part 2: PCT procedure before the EPO (Euro-PCT Guide)

Lack of unity 
Where the Euro-PCT application does not meet the requirement of unity of invention, the procedure laid down in Rule 164 EPC applies upon entry into the European phase.
As from 1 November 2014 a completely revised procedure under Rule 164 EPC will apply (see point 654). The amended text of the rule has been published in the Official Journal, and more information on the revised procedure will be provided in the first half of 2014.
OJ 2013, 503