Q&A defines contact with the key (in relation to [R28], but it would also apply to [R01]):
Quote:
Q. What is the definition of "in contact with its Key"? Is it one wheel touching the edge of the key, all wheels on the key, a portion of the bumper or frame overhanging the vertical projection of the key?
FRC1051 2012-01-20
A. There is no formal definition of "contact", so the colloquial definition is valid here, "the act or state of touching" (from dictionary.com).
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