Organization owners can set team creation permissions.
If you do not set team creation permissions, all organization members will be able to create teams by default.
- In the upper-right corner of GitHub, select your profile photo, then click Your organizations.
- Next to the organization, click Settings.
- In the "Access" section of the sidebar, click Member privileges.
- Under "Team creation rules", select or deselect Allow members to create teams.
- Click Save.