What this collection records
An HMTc standard adopts the strictest existing maximum level set by any credible government, applied cell-by-cell. That claim is only checkable if the underlying government values are published in one place, in the basis each instrument states, with the provision that carries them. These pages are that place.
39 instruments are tracked, spanning national and supranational food-contaminant law across every product matrix. 5 are currently cited by a published HMTc standard; the rest are recorded for register completeness, available as the program expands to new categories and jurisdictions. California Proposition 65 lists several of the eight metals as hazards but, as a right-to-know warning statute, sets no maximum level in food, and is recorded for that gap alone.
A reference page is a record of law, not an HMTc threshold. It states what a government requires; the standard page states what the program requires, and names which of these instruments binds each cell.
The instruments
Official titles are given in full, as cited. The count is the number of heavy-metal maximum levels the instrument sets across all its product categories.
Limits recorded, by instrument
2143 heavy-metal maximum levels across 39 instruments. A high count is breadth of product categories covered, not strictness; a single value from a narrow instrument can still be the strictest existing limit for a cell and bind the HMTc value.
How these interact with HMTc
HMTc certification standards adopt the strictest existing maximum level set by any credible government, applied cell-by-cell. Where an instrument holds the strictest value for a (product, analyte) cell, it binds the HMTc limit and the standard cites its page. These pages do not set or justify any HMTc threshold; they record the sovereign requirement the program measures against.