Community mental health center is not a government instrumentality, since it was not started by the government, its leadership isn't selected by the government, and the government doesn't have the power unilaterally to terminate it.
Question certified on the basis of the relationship withe the state employees retirement system.
http://www.opn.ca6.uscourts.gov/opinions.pdf/18a0186p-06.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.