The advance decision will have effect as if the person had made it at the time with the relevant capacity.
A healthcare professional will no longer need to consider if any specified treatment is in the best interests of the decision maker, if an advance decision has been made, and will not be liable for holding back or withdrawing the treatment.
Suppose an advance decision is created after a Health and Welfare Lasting Power of Attorney. In that case, an advance decision will take priority over any decisions made by your attorneys (so far as they conflict with the advanced decision) concerning your healthcare.
To have effect, a decision-maker must not:
- Withdraw an advance decision whilst the decision-maker still has the relevant mental capacity, and
- Make a Lasting Power of Attorney for Health and Welfare (which usually invalidates an advance decision) to give your attorney(s) the legal authority to refuse or give specific medical treatment.
The effect of an advance decision made before the MCA 2005
If made before 1st October 2007 (when the MCA 2005 came into force), an advance decision will be determined by the common law rules before the Act came into force, which reflects the current legal position of the MCA 2005.