Del. Const. art. III, § 20
(a)(1) In case the person elected Governor shall die or become disqualified before the commencement of the person elected Governor’s term of office, or shall refuse to take the same, or in case of the removal of the Governor from office, or of the Governor’s death, resignation, or inability to discharge the powers and duties of the office, the same shall devolve on the Lieutenant Governor; and in case of removal, death, resignation, or inability of both the Governor and Lieutenant Governor, the Secretary of State, or if there be none, or in case of the Secretary of State’s removal, death, resignation, or inability, then the Attorney General, or if there be none, or in case of the Attorney General’s removal, death, resignation, or inability, then the President pro tempore of the Senate, or if there be none, or in case of the President pro tempore’s removal, death, resignation, or inability, then the Speaker of the House of Representatives shall act as Governor until the disability of the Governor or Lieutenant Governor is removed, or a Governor shall be duly elected and qualified.
(b) Whenever the Governor transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives the Governor’s written declaration that the Governor is unable to discharge the powers and duties of office, and until the Governor transmits to them a written declaration to the contrary, such powers and duties shall be discharged by the Lieutenant Governor as Acting Governor.
(c)(1) Whenever the Chief Justice of the Delaware Supreme Court, the President of the Medical Society of Delaware, and the Director of the Division of Substance Abuse and Mental Health, acting unanimously, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives, their written declaration that the Governor is unable to discharge the powers and duties of office because of mental or physical disability, the Lieutenant Governor shall immediately assume the powers and duties of the office as Acting Governor.
56 Del. Laws, c. 403 and 57 Del. Laws, c. 295; 71 Del. Laws, c. 379 and 72 Del. Laws, c. 136; 83 Del. Laws, c. 351 and 84 Del. Laws, c. 18; 84 Del. Laws, c. 281 and 85 Del. Laws, c. 5;