872. Limitation until attempted alienation.

Although provisions in restraint of alienation, or excluding creditor's rights, are invalid when applied to an absolute interest, there is nothing to prevent property from being settled for life estates determinable on alienation, bankruptcy or insolvency, with a limitation over upon the happening of any of those events1. This may be effected by merely directing that the income of the property be held on protective trusts for the benefit of any person for the period of his life or for any less period