By default, any logged-in user with access to Structure can create new structures of their own. However, you can restrict this ability to one or more user groups.

To select who can create new structures:

1. Navigate to Administration | Structure | Configuration.
2. Click Select Who Can Create Structures.
3. Select whether new structures can be created by all Structure users or by selected user groups.
4. In the latter case, change the Selected Groups list by selecting one or more user groups and using Add and Remove buttons.
5. Click Apply when done.