Earlier in the rules 25.232 give an example of the HW unit having to enter an Entrench/Crest if
lacking sufficient MF to enter a new location. It still gets to move in its hex as it CAN enter the Fox/Crest.
Also, Impulse Move is mentioned in 25.232. For all intents and purposes you CUT and PASTE that rule section to 25.232. Therefore, subsequent 25.234 abilities will be considered latter rules as you don't want to print the entire rule section for each reference...that's why refer to them. All rules can't occupy the same line in the RB.
In Addition, your highlight of
no HW Unit is able to enter a new Location, the HW ends. also is pretty clear. It doesn't state "
any HW unit is not able to enter" When a unit can't enter another location, it ceases to be a HW unit as it will finish it's MPh there since it can't enter another location.