Except as provided by Section 224, if a husband and wife die leaving community or quasi-community property and it cannot be established by clear and convincing evidence that one spouse survived the other:
(a) One-half of the community property and one-half of the quasi-community property shall be administered or distributed, or otherwise dealt with, as if one spouse had survived and as if that half belonged to that spouse.
(b) The other half of the community property and the other half of the quasi-community property shall be administered or distributed, or otherwise dealt with, as if the other spouse had survived and as if that half belonged to that spouse.