A 3rd party deal..., page-27

I think you've got the compulsory acquisition threshold in mind. At 90% a party can compulsorily acquire the balance of shares. OCJ can block compulsory acquisition but not a scheme of arrangement and they can't stop the company being taken private either by resolution.

≥5% (obligation to file substantial holding notice),
>10% (ability to block compulsory acquisition),
>20% (takeovers threshold),
>25% block special resolution and schemes of arrangement
50% (ability to pass ordinary resolution),
75% (ability to pass special resolution) 90% (entitlement to compulsory acquisition).