Willis,
Interesting post, thought provoking.
Competency therefore = Qualification, experience and knowledge
Based on the two legal precedents you have quoted this statement does not lead me to the same conclusion as you. Should it not read Competency therefore = experience and knowledge and training will help.
Qualification alone will not deliver competency, knowledge alone will not deliver competency only experience of the three can on its own give competence. Not saying it always will but it is the only one that can deliver it on its own.