1.  Restrains voluntary and involuntary transfers.  A spendthrift provision is valid only if it restrains both voluntary and involuntary transfer of a beneficiary's interest.  

2.  Terminology.  A term of a trust providing that the interest of a beneficiary is held subject to a "spendthrift trust," or words of similar import, is sufficient to restrain both voluntary and involuntary transfer of the beneficiary's interest.  

3.  No transfer by beneficiary; creditors and assignees.  A beneficiary may not transfer an interest in a trust in violation of a valid spendthrift provision and, except as otherwise provided in this chapter, a creditor or assignee of the beneficiary may not reach the interest or a distribution by the trustee before its receipt by the beneficiary.