Why ask?
If the EU Parliament objects just Brexit.
I seriously doubt that after Britain voted to leave that the EU is going to raise a fuss.
If one more country decides to leave the dam will break and the EU is history.
The EU is being held together with chewing gum and chicken wire.
The EU parliament is just a rubber stamp. The real problem is with the Commission, who both writes and passes laws.
And Norway isn’t even a full member of the EU with the minimal “voting rights” that a member state avails of. It’s a member of the European Economic Area, which means they have to obey EU laws without even having a say; and on top of that they went into the Schengen Agreement, which stipulates no border controls and is 84 pages long.