In reply to Allen Bingham.

Yes, that is correct. The documentation is at http://support.sas.com/documentation/cdl/en/lefunctionsref/63354/HTML/default/viewer.htm#p026ygl6toz3tgn14lt4iu6cl5bb.htm
The various seeds were sometimes necessary to overcome the fact that the older RAN* functions have a relatively short period. Fortunately, the newer RAND function has such a long period that you no longer need to worry about using multiple seeds.