The ACP, AMD and LPA are different tools, but complementary in helping your loved ones in the event you lose mental capacity.
The LPA appoints a legal donee to look after your financial and/or personal welfare decisions on your behalf. Such matters may include: where you should live, who you should live with, daily lifestyle, and healthcare decisions.
The ACP helps you to discuss and document matters related to your healthcare. It is a broad plan that may include extent of treatment, pain control options, and what to do should your heart suddenly stop. The ACP is broader than the AMD because the AMD only applies if you are terminally ill AND on life sustaining treatment. In such case, the AMD helps you to avoid unnecessary prolonging the inevitable dying process.