Is the power of attorney revoked by death of principle?

The Power of Attorney was written in 1997 in State of Maryland; County of Baltimore. The principle (the person who wrote it with notary) has died. The document states that: 'Notwithstanding anything herein contained to the contrary, this Power of Attorney shall not be affected or impaired by my disability, it being my express intention that this Power of Attorney shall survive my disability pursuant to the Provision of Title 13, Sections 601 and 602, Estates and Trusts, Annotated Code of Maryland (1974, 1991) United States of America and any changes or supplements thereto.