Final answer:
Higher level response teams such as SIRT Level 3 often have the ability to escalate issues to the Legal department, depending on the organization's escalation protocol.
Step-by-step explanation:
In the context of a Security Incident Response Team (SIRT), the group that has the authority to escalate an issue to the Legal department would largely depend on the organizational structure and the specific escalation protocols in place. Typically, teams are structured in levels, with higher levels having more authority and responsibility. Without knowing the specific protocol of the organization in question, it's difficult to ascertain which level aside from SIRT Level 2 can escalate to Legal. However, in many organizations, higher level response teams such as SIRT Level 3 and above often have the ability to escalate issues to the Legal department due to their advanced understanding of the situation and the potential legal implications.