I understand the key is the compatibility_level of both source and target databases and not the actual version of the codeset. Oracle has minimun compatiblity requirements, check here http://docs.oracle.com/cd/B28359_01/...3.htm#i1007244
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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