ROBERT WILLIAM BATES vs. COUNTY OF SAN MATEO, ATHENS ADMINISTRATORS
The Workers' Compensation Appeals Board affirmed a prior award finding the applicant sustained two cumulative heart injuries as a deputy sheriff. The defendant sought to apportion permanent disability between these injuries, citing Labor Code section 4664(a) and the *Benson* case. However, the Board ruled that Labor Code section 4663(e) prohibits apportionment to causation for injuries presumed industrial under Labor Code section 3212, overriding general apportionment rules. Therefore, the applicant's full permanent disability rating was awarded without apportionment.