The document discusses the legal requirement of the "three certainties" for establishing an express trust. It explains that for a trust to be valid there must be (1) certainty of intention to create a trust, (2) certainty regarding the trust property or subject matter, and (3) certainty of beneficiaries or objects. It provides details on each of the three certainties, including examples from case law that illustrate how courts determine if each certainty is fulfilled. The document concludes by noting exceptions to the certainty requirements, such as charitable trusts.