You are expected to complete a basic PhD training programme consisting of at least 30 EC, which is equivalent to 840 hours.
The basic training consists of mandatory courses as well as elective ones. The training and education programme for CCA and AI&II PhD candidates can be found here.
CCA and AI&II may grant exemptions when the PhD candidate has followed a similar course or has acquired the necessary knowledge in a different way. Please include a letter with motivation from your promotor and a short description of the alternative course / activity in the Training and Supervision plan. This also counts for a AIOS and external PhD student.
More information about the courses is shown at the PhD portal. Note that you must obtain permission from your supervisor or the financial administrator before you can enroll in these courses.