If the class has multiple sections that you need to register for (e.g., a lecture plus a lab or recitation), you only need to make a single permission request.
If you were prompted for a permission code while using PS Mobile, you may still be able to self-enroll without a permission code by visiting the Student Center on my.pitt.edu.
Permission requests submitted 48 hours before the add/drop deadline may not be approved in time and require an additional fee to process.