The Persistent Cyber Training Environment (PCTE) under Cyber Innovation Challenge #4 has requirements at the TS/SCI level. Due to PEO STRI’s business and approval model, PEO STRI does not support requirements above the Secret classification level for the TReX Agreement Vehicle. Persistent Cyber Training Environment will be utilizing a stand-alone agreement vehicle for the Cyber Innovation Challenge #4 prototype effort, which is outside of the TReX agreement vehicle. Any additional Persistent Cyber Training Environment Cyber Innovation Challenge #4 prototype effort information will be posted to beta.SAM.gov. Please follow the following link for current information related to this prototype effort.