In the TO:AR on page 19 there are rules regarding the usage of Hull Down with vehicles. With these rules it specifies 3 situations:
Entering a half level hex
Being next to a half level hex
And entering a fortified position.
The rules for the fortified position state that they utilize all of the above rules for half level hexes; however, the first rule states that the unit must use 2 MP, whilst the second rule states the effect happens automatically. For the purpose of a fortified position, which of these two apply?