(a) Upon introduction and admission into evidence of a valid certificate of death wherein the time of death of the decedent has been entered by a licensed physician, a presumption exists that death occurred at the time stated in the certificate of death.
(b) A presumption existing pursuant to Section (a) of this Article is sufficient to support a finding as to time of death but may be rebutted through a showing by a preponderance of the evidence that death occurred at some other time.