Which criterion does NOT apply to non-USCs subjected to removal?

The criteria that does not apply to non-US citizens (non-USCs) subjected to removal is having legal counsel present. In the context of immigration proceedings, individuals are generally not entitled to have an attorney present during certain phases of the removal process. This often includes preliminary procedures and certain hearings, where the presence of legal counsel is not guaranteed as part of the removal process.

In contrast, admissibility for national security grounds is indeed applicable to non-USCs, as individuals can be removed if they pose a risk to national security. Being a visa waiver participant also applies because individuals in that category must comply with specific terms of their entry, and violations can lead to removal. Stowaway status is relevant too, as individuals who arrive in the U.S. without authorization, such as stowaways, can be subjected to removal.

Thus, the absence of a requirement for legal counsel in these proceedings differentiates it from the other criteria listed, making it the correct choice in identifying a criterion that does not apply in this context.