AAW professionals who fail the required Contracting (CON) Certification Exam (CON 3990V) and have not already taken the CON Certification Exam Prep Course (CON 3900V), will be required to successfully complete CON 3900V before they can apply again to take the CON exam. Additionally, individuals who fail the CON exam will have the opportunity to re-take the exam no earlier than 30 days after the preceding attempt, with no more than three attempts in a 12-month period.
Source: DAU Training Policy, which can be found in the DACM Policy Library (https://asc.army.mil/web/alt-workforce-policy-procedure/)
