No tenderness at the posterior midline of the C-spine
No focal neurologic deficit
Normal level of alertness (GCS 15, AAO x 3)
No evidence of intoxication
No clinically apparent pain that might distract the patient from the pain of a C-spine injury

Canadian C-Spine Rule

Not 65 or older
No dangerous mechanism
Sitting position in emergency department
Absence of midline cervical spine tenderness
Can actively ROM 45 degrees both left and right