No assignment of any right
to an annuity, pension, or retirement allowance
will be valid except:
assignments made pursuant
to certain support orders (as discussed above),
assignments made to provide
restitution in instances of dereliction of
duty,
assignments made by a member
for the purpose of payment of a health or
life insurance premium, for a policy related
to work and in effect on the members
retirement,
repayments of benefits
paid by the Commonwealth for those individuals
who have become public charges
notice of levy issued by
the Internal Revenue Service for the purposes
of collecting unpaid federal tax.