A registered public charitable trust can potentially be merged with a newly created similar trust, even with an increased number of trustees. This process generally requires a two-thirds majority vote from the trustees of both trusts and may need to be filed with relevant authorities. While there's no single central act, individual states have their own trust laws, such as the Bombay Public Trusts Act, which allows for amalgamation under specific conditions. Legal precedent suggests that merging trusts is permissible if their objectives remain unchanged and there are no disputes.