Pub. L. 85-56, tit. IV, pt. B, subpt. II, sec. 423
combination of ratings
combination of ratings Sec. 423. (a) The Administrator shall provide that, for the purpose of determining whether or not a veteran is permanently and totally disabled, ratings for service-connected disabilities may be combined with ratings for non-service-connected disabilities. (b) Where a veteran, by virtue of subsection (a), is found to be entitled to a pension under this subpart, and is entitled to compensation for a service-connected disability, the Administrator shall pay him the greater benefit.