3.13 vs. 12.56 in 4th edition rules

[g1ul10]

According to 3.13, when activating unit players "need not pre-designate directions or targets", basically they have just to choose between "Movement" or "Fire". Conversely, in 12.56 it is mentioned that the unit "intent to assault" is noted at the time of activation. Should I assume that specific trumps generic and 12.56 takes precedence over 3.13? The "intent to assault" does also include the designation of a specific hex if multiple assault targets are available?