I don't think it's as exciting as that, MAD. The stuff referred to in this article is before a Bill us even introduced into Parliament - her lawyers or whoever appear to get a chance to see if anything might harm her estates etc. If they see anything then they'll probably look to protect her interests and get something altered.
In Scottish terms, this'll all have happened before a Bill is formally introduced to the parliament and can be scrutinised by MSPs.
When a Bill is sent to the Palace for Royal Assent (her signature as you put it), it's highly unlikely that there is going to be anything in the Bill that she'd be against. There is a timeframe from the point a Bill is passed in Parliament where it could be challenged/objected to (28 or 40 days is what's in my head) but inevitably Royal Assent is given and formalises a Bill becoming an Act of Parliament.