Just remember the rhyme 'DIN goes IN' and you'll never struggle with this question ever again.
Special procedures can always be found on the back of the PADI RDP or on the inside lid of the PADI eRDPml.
Any activity that causes the diver to breathe an increased amount of gas than their normal consumption rate can result in more nitrogen loading, therefore, must be planned based on that increased loading to remain conservative within the table limits.
A common mistake with questions like this is to confuse the physical amount with partial pressure. The percentage of the gas will not change under pressure so if it was 2% in the cylinder at the surface it will still be 2% at depth.
All gases want to reach a start of equilibrium. By increasing the amount of oxygen in the breathing mix it will reduce the amount of nitrogen in the lungs it will prompt the diffusion of nitrogen from the diver's tissues.
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Although both courses can be run concurrently with the PADI Open Water Diver Course, if you check Paperwork and Admin Procedures and Linking Courses you'll see it indicates only one Specialty Diver program may be introduced during that course. This really cuts down on task loading for the students.
Learn more about Linking Courses and teaching methodology on one of my upcoming PADI Instructor Development Course programs.