Simplify the following text for a Grade 11 native English-speaking person.
Original: A compromise was made that banned exportation of Indian hemp to countries that have prohibited its use , and requiring importing countries to issue certificates approving the importation and stating that the shipment was required `` exclusively for medical or scientific purposes . ''
Simplified: A compromise was made that banned the export of Indian hemp to countries that have banned its use . Importing countries were made to issue certificates approving the import and stating that the shipment was required `` exclusively for medical or scientific purposes . ''