Absence of Beneficiary Designation. In the absence of a valid Beneficiary designation, or if, at the time any benefit payment is due to a Beneficiary, there is no living Beneficiary validly named by the Executive, the Employer shall pay the benefit payment to the Executive’s spouse. If the spouse is not living then the Employer shall pay the benefit payment to the Executive’s living descendants per stirpes, and if there are no living descendants, to the Executive’s estate. In determining the existence or identity of anyone entitled to a benefit payment, the Employer may rely conclusively upon information supplied by the Executive’s personal representative, executor, or administrator.