If the revocable trust that resulted from the estate plan was validly created 15 years ago, then the estate and trust should be entirely valid in Connecticut. So long as the trust was validly created, there can be no way to satisfy the conditions for the revocation of the trust. If a trust is created in any jurisdiction that abides by United States law, then that trust is valid and recognized in any jurisdiction.
If you are interested in amending the trust, because it is being brought under Connecticut law and was created 15 years ago, you should consult an experienced trusts and estates attorney. An experienced attorney will facilitate this process for you, and likely handles issues such as this regularly.
If you have any further questions regarding trusts or estate planning in Connecticut, please contact Joseph C. Maya, Esq. at (203) 221-3100 or e-mail him directly at JMaya@Mayalaw.com.