Oh dear, I'm bored so I'll bite...
Yes you must always obey the rules as copied in written documentation!
To explain this case more fully:
1. Taxi at Exactly 6 knots.
2. Not 5, not 7knots.
3. You must not modulate speed for any reason.
4. When STOP message displayed: Apply full braking.
5. Halt! Immediately!
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