This heading covers herring presented as fillets in frozen form. Whole frozen herring, herring in brine, smoked herring, and herring prepared or preserved in other ways are classified under separate HTS headings. The fillet form — with the backbone removed — is the key distinguishing characteristic for classification here.

Yes. Northeast Atlantic herring is managed under annual TAC (total allowable catch) quotas set through multilateral agreements among Norway, Iceland, the EU, and other coastal states. Quota negotiations — which sometimes break down — can create supply volatility and price swings that affect US import volumes, particularly in the first quarter of each year when new quota allocations take effect.