what is the legal significance of the United States Restrict

what is the legal significance of the United States Restrictions on Import of Tuna and the Marine Mammal Protection Act (MMPA)?

Solution

Under the MMPA the legal significance on the restrictions of imports of tuna are that the US MMPA sets the dolphin protection standards for domestic american fishing fleet.

According to the US tuna often swim beneath the dolphins in Pacific ocean region. So those who are exporting Tuna into the US should make the authorities beleive that they did not cause any harm to dolphins which is logically impossible as tuna swims beneath the dolphins. So that is why US imports restriction on import of tuna.