never seen this before

I've never seen this before in a the terms and conditions of options. Is this a forewarning of what is to come?

"Change of Control
If, in the opinion of the board, a Change of Control Event has occurred, or is likely to occur, the board may declare an Option to be free of any conditions of exercise and options which are so declared may, be exercised at any time and in any number.
A Change of Control Event occurs if a takeover bid is made to acquire all of the issued shares in the Company (or other transaction is initiated which, in the board's opinion, has an effect similar to a full takeover bid for the shares in the Company, including a scheme of arrangement) and the bid has resulted in or (in the opinion of the board) will result in the proponent of the bid acquiring more than 50% of the issued shares in the Company."