It is possible to edit PDF/A documents by following a few steps; the US Courts have provided a few tips in furtherance of their move to requiring PDF/A for electronically submitted documents.
They offer step-by-step guidance, including how to remove PDF/A and disabling PDF/A viewing mode.
Country of Origin: United States
Source: US Courts
http://www.ord.uscourts.gov/en/e-filing-help/editing-pdf-...
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