As an OTS pilot, I have received a "pre-offer of employment" in the end of the interview day and provided a urine sample. A week later, I received an email (and a call afterwards for orientation dated June 6th) which stated that I had passed the "Captain's Review Board". This was the official CJO (subject to passing PRD, PRIA and airman file checks) which stated the terms and conditions such as monthly guarantee, hourly rate, per diem and domiciles.