Does Export Filing: CHIEF/CDS also support several special procedures which are used in the UK like PSA for supplementary declarations, C21, EXS, and others? Ruth Setzler November 30, 2020 12:58 Updated Export Filing: CHIEF/CDS has your back with all major special export procedures – just leave the details to us. Related articles What happens if the customs requirements change? Getting help and support from AEB Applying AEB standard templates (easy mode) How does Export Filing: CHIEF/CDS work with the HMRC systems? Why do I receive a login error when the details entered are correct? Comments 0 comments Article is closed for comments.