Mental Health Bill [HL]

My Lords, I seek clarification on one point. Those of us who come new to this material find a provision in Amendment No. 75, which refers to the possible, "““withdrawal or withholding of ordinary nursing care or personal care whether or not P [the patient] has been deprived of his liberty””." Obviously such a provision attracts attention because no one wants to get into a situation where there could be a withdrawal or a withholding of ordinary nursing care. What I am not sure about is why the amendment is necessary. Is it because there is no provision in the Bill, or is it because there is a risk that such a situation could arise? It is something one would not expect to find. Therefore, I should like to know why it is necessary to put it into an amendment to the Mental Capacity Act 2005. I am not sure why it is required.