Hold on. No new ivory products can (legally) be imported or exported from the US, but ivory products already in the US can still be bought and sold, albeit subject to restrictions. Providing demand for ivory remains roughly constant, and the US continues not to be an ivory producer, we would expect that to lead to a rise in ivory prices in the US market, and almost no ivory being exported (but some being imported on the black market).
Hold on. No new ivory products can (legally) be imported or exported from the US, but ivory products already in the US can still be bought and sold, albeit subject to restrictions. Providing demand for ivory remains roughly constant, and the US continues not to be an ivory producer, we would expect that to lead to a rise in ivory prices in the US market, and almost no ivory being exported (but some being imported on the black market).