A different apportionment of costs may be ordered in accordance with Art. 104 EPC and Art. 16 RPBA 2007, if a party, for example, withdraws a request for oral proceedings, asks for their postponement, or fails to attend them (see chapter III.R.2.2. "Acts or omissions prejudicing the timely and efficient conduct of oral proceedings").
Source: http://www.epo.org/law-practice/legal-texts/html/caselaw/2019/e/clr_iii_c_8_1.htm
Date retrieved: 17 May 2021