The binding legal principles established are: (1) Under section 68(4) of the Administration of Estates Act, where a person already married under customary law purports to enter into a monogamous marriage under the Marriage Act, the subsequent marriage is deemed to be a customary law marriage for purposes of estate distribution. (2) The ranking of wives in polygamous customary marriages for inheritance purposes is determined by the chronological dates of marriage, with the first wife being the senior wife entitled to two shares under section 68F(2)(b), regardless of whether subsequent marriages were formalized under statutory law. (3) Actions taken by duly appointed agents under a valid General Power of Attorney in estate administration, including consultation on and agreement to inheritance plans, are binding on the principal. A beneficiary cannot later disavow such actions without having terminated the agency. (4) The Master's decisions in estate administration, including confirmation of inheritance plans under sections 68D and 68E of the Administration of Estates Act, can only be challenged through the proper statutory review or appeal procedures under section 68J, not through declaratory applications. (5) Courts will look at the substance and grounds of applications to determine their true nature; an application nominally seeking declaratory relief will be treated as a review if the grounds raised (such as bias, malice, lack of consultation, or gross irregularity) are review grounds.