SPM as "calon mengulang" (NOT SPMU), how do I take subjects that have PBS?

Let’s say I want to redo my SPM with the following subjects:

  • Biology
  • Chemistry
  • Physics

However, they are all considered as “mata pelajaran dengan PBS”. So, what does that mean? Do I have to go back to school and do whatever classwork like back in Form 5? Or can I just only do the exam in November?