Cycle law: definition of Dismounting
By definition, dismount means to get off the bicycle. That means you should not be straddling the top tube, but should be standing next to the bicycle. Then, you can walk the bike if needed. This is the safest bet, and the one you should use unless you have additional information.

You shouldn't just get off the seat and pedal with one foot or waddle, unless you have additional information that says its okay in that area.