Trustee service is not available for this extension

This can be activated.

Violation of applicable laws and regulations, including 3rd party interests, names and activities that are offensive, common internet terms are prohibited. Specific violations include, but are not limited to: indecency, pornography and gambling, contrary to public policy or morality, to mislead the public and/or contrary to good and fair business practices.

This can be registered by any person or any company.

The minimum term for .so  domain names is 1 year

The domain registration timeframe for .so during general availability is Instant.

Domain Names must:

• have minimum of 3 and a maximum of 63 characters;
• begin with a letter or a number and end with a letter or a number;
• use the English character set and may contain letters (i.e., a-z, A-Z),numbers (i.e. 0-9) and dashes (-) or a combination of these;
• neither begin with, nor end with a dash;
• not contain a dash in the third and fourth positions (e.g. www.ab- -cd.so); and
• not include a space (e.g. www.ab cd.so).

You may visit them here: SO Registry.