What can be said about the lowest permission level, permission level 0?

The lowest permission level, often referred to as permission level 0, is primarily designed to restrict access significantly. This means that users assigned this level do not have the ability to edit or create any travel documents. Instead, their capabilities are limited to viewing or reading information without making changes. By not granting permission to edit, this level effectively ensures that sensitive data or important documents are protected from unintentional alterations by users who may not have the appropriate training or authority to make such changes.

In contrast, higher permission levels would allow various degrees of access and control over the system's functionalities, with permission level 0 focusing squarely on maintaining strict security and integrity of critical data.