I am no attorney, but I believe upon the passing of the ones named, the assets will be distributed. But depending on how it was written, the new trustee may have to hold the assets for a certain period of time or event. I believe the question here is who the new trustee is.
irrevocable trusts can remain up and running indefinitely after the trustmaker dies, but most revocable trusts disperse their assets and close up shop. This can take as long as 18 months or so if real estate or other assets must be sold, but it can go on much longer. How long it takes to settle a revocable living trust can depend on numerous factors.