"Section 606 prohibits the acquisition of relevant interest in...

"Section 606 prohibits the acquisition of relevant interest in voting shares if, because of that transaction, a person's voting power in the company:
1, increases from under 20% to over 20% or
2, increases form a starting point that is above 20% and below90%
Compulsory acquisition:
A bidder under a takeover bid may compulsorily acquire any remaining securities in the bid class if during, or at the end of, the offer period, the bidder and their associates have:
1, relevant interests in at lease 90%(by number) of the securities in the bid class and
2, acquired at least 75%(by number) of the securities that the bidder offered to acquire under the bid.
Ch 6A sets out the requirements for any compulsory acquisition process."

Of course the more "No" voting the stronger ability for us the block this transaction. You don't have to sell your share to Pfizer unless they are able to process the compulsory acquisition.

Correct me if I am wrong.