Please see in the Approach to Examining section in the Syllabus and study guide that the 20 and 30 mark Qs will be drawn principally from planning, controls and evidence/procedures
Sorry – I was answering your original question on my mobile and I didn’t see that you specified Section A. Any areas of the syllabus can come up there – typically A and E because they are not “principal” areas for Section B – though they could make up not more than 10 marks of a Section B Question.