The starting year of the PhD programme determines the academic regulation:

Admission year Academic regulation
Students admitted to the doctorate in the 2012-2013 academic year and later RD99/2011 (Catalan version only) 
Students admitted to the doctorate before the 2012-2013 academic year RD778/1998 and RD1393/2007 (Catalan version only) 
For further information: Academic regulations for Doctorate