The scope of the search conducted by the EPO as SISA, i.e. the documentation searched, is the same as for any international search carried out by the EPO as ISA (see point 220).
The SIS is conducted on the international application as originally filed, and neither amendments filed under Article 19 PCT and/or Article 34 PCT nor informal comments will be taken into account.
The limitations related to subject-matter set out in Annex C to the Agreement EPO-WIPO apply both where the EPO acts as ISA and where it acts as SISA (see points 257 ff). The same applies as to any other reason for non-establishment of a (full) search, i.e. complex applications, missing sequence listings and non-unity (see points 253 ff). As to particulars of the procedure in case of a missing sequence listing and non-unity, please refer to points 288 and 292.
Source: http://www.epo.org/applying/international/guide-for-applicants/html/e/ga_c_iv_2.html
Date retrieved: 30 December 2018