One of the good things about the Cochrane review is that it is available to the public, and the summaries are written in fairly plain English.

This review of psychological treatments for PTSD — which is the rubric under many people are treated by ACC has this summary.

Psychological treatment of post traumatic stress disorder (PTSD)

This review concerns the efficacy of psychological treatment in the treatment of PTSD. There is evidence that individual trauma focused cognitive-behavioural therapy (TFCBT), eye movement desensitisation and reprocessing (EMDR), stress management and group TFCBT are effective in the treatment of PTSD. Other non-trauma focused psychological treatments did not reduce PTSD symptoms as significantly. There is some evidence that individual TFCBT and EMDR are superior to stress management in the treatment of PTSD at between 2 and 5 months following treatment, and also that TFCBT, EMDR and stress management are more effective than other therapies. There is insufficient evidence to show whether or not psychological treatment is harmful. Trauma focused cognitive behavioural therapy or eye movement desensitisation and reprocessing should be considered in individuals with PTSD. Psychological treatments can reduce symptoms of post traumatic stress disorder (PTSD). Trauma focused treatments are more effective than non-trauma focused treatments.

via Psychological treatment of chronic post-traumatic stress disorder (PTSD).

Now, this is much more specific than counselling. There are treatments that add more than the effect empathic listening has.

Pity ACC does not insist on them.