The way I read it, we can only get to the blue line if we have both 'approach authorized' and 'aerodrome authorized' as indicated. If both of these are met then 'In all cases - Crew can perform approach and landing'. This is true since if you managed to get to that final box then in all cases...
Yes, if aerodrome level of service is more restrictive than the approach ban minima then it becomes the limitation.
This is part of the confusion with approach bans. Even if you are not approach banned, you still are not able to land since you would contravene CARs during the taxi.
Read this...