Mass. Gen. Laws ch. 190B, § 5-502: Durable power of attorney not affected by lapse of time, disability or incapacity

Section 5–502. [Durable Power of Attorney Not Affected By Lapse of Time, Disability or Incapacity.]

All acts done by an attorney in fact pursuant to a durable power of attorney during any period of disability or incapacity of the principal have the same effect and inure to the benefit of and bind the principal and his successors in interest as if the principal were competent and not disabled. Unless the instrument states a time of termination, the power is exercisable notwithstanding the lapse of time since the execution of the instrument.