I'm Doug, and I'm sorry to hear of the confusion. My goal is to provide you with excellent service today. I've been a CA licensed for more than 3 decades and I handle employment law issues.
The qualification for stress leave is not based on a litmus test of requirements. Rather, and I presume that you are referring to stress leave under Workers' Compensation, stress is a mental dysfunction that is different for each person and is strongly dependent on their psychological makeup, their relevant life history and the situations in the workplace (coupled with what is going on in their life) which create emotional distress so significant that they cease to function normally and begin to exhibit outwards signs of abnormal and debilitating stress.
Only a physician/mental health practitioner can adequately evaluate the stress level of the patient and then determine that the person's symptoms justify a finding that the patient should be removed from the stressors in the workplace in order to help them recover from the symptoms which are debilitating them.
I'm guessing that what you really need is a list of potential symptoms/actions that might be exhibited by an employee who is suffering workplace induced stress. Here is a link to a good article which lists many of the things that you can be on the lookout for when observing or communicating with an employee who you suspect may be experiencing the kind of stress in the workplace which might lead to the necessity of stress leave: http://www.hse.gov.uk/stress/furtheradvice/signsandsymptoms.htm
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I wish you and yours the best in 2016,