Administration previously announced elephant trophy imports will be dealt with on "case-by-case basis."
A new study tracking the movement of the mammals to detect risk of poaching may help save the lives of elephants.
Poison is becoming the weapon of choice for poachers in Zimbabwe, where the elephant population has fallen by 10,000 in the past decade.
The African country says it needs to sell its ivory stockpile to raise money for conservation.
Roger Gower died on Friday after being attacked by suspected elephant poachers.