Section 7-1.1. When trust interests not to merge

A  trust  is not merged or invalid because a person, including but not
  limited to the creator of the trust, is or may become the  sole  trustee
  and the sole holder of the present beneficial interest therein, provided
  that  one  or  more  other  persons  hold a beneficial interest therein,
  whether such interest be vested or contingent, present  or  future,  and
  whether created by express provision of the instrument or as a result of
  reversion to the creator's estate.