Equipment Freeze
I like how the 'letter' also states that you will be expected to operate both the 300 and the 400, but when you are 'moved' to the 400 the 18 month equipment freeze from the EBA applies.. So you get approved on the 400, are expected to operate the 200, 300 and 400, but can't bid for a slot at another base to operate just the 200/300's because of the EBA clause.
So just to review, the message is 'you HAVE to fly the 300 and 400, but you can't fly the 300 because you are 'frozen' for 18 months. What the?