18.104.22.168.3. Do not authorize PTDY in place of leave or special pass, or in conjunction with a special pass. 22.214.171.124.4. Judiciously approve PTDY consistent with organizational mission needs and the actual time necessary to complete the PTDY. 126.96.36.199.5. May authorize PTDY in conjunction with ordinary leave. This requires separate AF Form 988. The ordinary leave start date must begin the next calendar day after termination of PTDY. If ordinary leave is taken prior to PTDY, the end date must be the calendar day prior to the PTDY start date. The combination of leaves will serve as one leave period. 188.8.131.52.6. May authorize PTDY with TDY. This requires an AF Form 988. 184.108.40.206.7. Charge leave for any additional absence beyond the approved PTDY.