 It has been suggested that the "dehors" theory is based on detective drafting of the Wills Act.In particular, whilst the term "will" is commonly used to refer to a specific document, the WIlls Act is designed to cover almost all documents except rules on public trust and secret trust that are to take effect after the testator's death.Indeed, the formality requirements of the Wills Act created the need for a set of prima facie documents, like the one commonly referred to.