Airports Act 1996

a person, or 2 or more persons under an arrangement, acquire shares in a company; and

the acquisition has the result, in relation to an airport‑operator company, that:

an unacceptable foreign‑ownership situation comes into existence in relation to the company; or

if an unacceptable foreign‑ownership situation already exists in relation to the company—there is an increase in the total of any type of stake held by any group of foreign persons in the company; and

the person or persons mentioned in paragraph (a) knew, or were reckless as to whether, the acquisition would have that result;