PCT International Search and Preliminary Examination Guidelines
PART II THE INTERNATIONAL APPLICATION
Chapter 7 Classification of International Applications
Classification of International Applications Excluded from International Search
7.08 If the International Searching Authority finds that the international application relates to a subject matter which it is not required to search or that a meaningful search cannot be carried out (see Chapter 9), the classification is nevertheless made, to the extent possible, and communicated to the International Bureau for the purposes of publication of the international application.