Rambam, Halachos Nachalos 6:10 — a convert (ger) regarding his father's inheritance

He will explain that the Rambam's novel point is that the condition of the bequeather is effective, not as those who erred and thought that the intent was to the condition of the heir, for if so, what is it teaching us? He discusses the power of Chazal to enact ordinances for the Bnei Noach.