What are the requirements of a valid Wassiyah?

The definition of Wassiyah or Will has been discussed briefly in the published article, entitled, "Misconception of Wassiyah". In order for your Wassiyah to be regarded as valid in the eyes of the Law, all four (4) of these elements, as stated in the Infographic prepared by Syameel Amirundanish Bin Soffian below, must be satisfied no matter what.