TTD Pty Ltd has a written constitution. The directors of the company want to amend the company's constitution to explicitly allow for virtual meetings. Which of the following is correct?

1. Company can modify its constitution by a special majority of the company's directors according to the common law.
2. Company can modify its constitution by a special resolution, according to section 125(2) of the Corporations Act 2001 (Cth).
3. Company can modify its constitution by a special resolution, according to section 136(2) of the Corporations Act 2001 (Cth).
4. Company can modify its constitution by a special resolution, according to section 124(1) of the Corporations Act 2001 (Cth).