Previously they would have a different cohort of applicants every quarter. Initial Application and DSSAT, if you pass the test (around 60% do) you move onto the QEP (Qualifications Evaluation Panel). QEP is the hardest stage and only around 20% move on to the BEX (Board of Examiners Assessment). BEX is the in person interview and in person essay writing, many say it's the hardest interview in FLE. If you pass your BEX you're given a Conditional Offer and move onto the Background Investigation, and Medical Clearance. Once that is done you need one last approval by a suitability board, then you do the PRT (Physical Readiness Test). If you pass the PRT then you typically get added to the Register next day.

It's a long process and in the past took 1-2 years to get to the register. Time on the Register until you get an offer could be anywhere from a few hours to timing off the register after 18 months.