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pcs won't like being told they "have to have their lower grades rerun." Actually that's not a factual statement anyway. The lower grades harmonic into the OT levels. They can be run again with full 1950-1960 to 1970 processes as given on the SH courses all through the 1960's. These are now
regrouped and sorted out and are called Expanded Lower Grades. (HCOB 25 Jun 70 II)