You will see folders named: sc12_rvt , sc12_lvt , sc12_hvt . You can mix them in one design using multi-Vt synthesis.
Access is strictly managed through specific official channels and typically requires a multi-step verification process: Direct Foundry Access tsmc 65nm standard cell library download
wget --user=X --password=Y https://secure.tsmc.com/.../tsmcN65_SC12_1.2v_lowpower_0812.tgz You will see folders named: sc12_rvt , sc12_lvt , sc12_hvt