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SEC-70 - TreasurySecurities are issued via an auction, through a complicated auction process. We may want to move these to a separate ontology, and should add the issuer, etc., which might mean that for modularization purposes it would be better to move them out of Bonds and into a USDebtInstruments ontology.
SEC-90 - This restriction is on all debt instruments - should be fixed in FBC in FinancialInstruments.