The American Physical Therapy Association has provided the following:

http://www.apta.org/StateIssues/DryNeedling/

The following paper also highlights the scope of allowance of dry needling by Physical Therapists:

https://www.fsbpt.org/download/forum_summer2012_stateofjurisdictions.pdf

We perform dry needling at our office and patients, espcially chronic pain patients, have benefitted greatly from this procedure.  Given the opiate crisis currently befalling our country, I find it puzzling that there would be an attempt to limit the application of conservative means for pain relief for patients.