Most countries in the tropics are signatories to the IPPC, the International Plant Protection Convention, which was established in 1952 to protect cultivated and wild plants from the introduction and spread of disease and pests. Because of this you will need to obtain an Import Permit from your Ministry of Agriculture in order to import apple trees into your country. The Import Permit dictates the conditions the exporting country's agricultural inspector uses to issue a Phytosanitary Certificate affirming the health and cleanliness of the plants. Both the Import Permit and Phytosanitary Certificate must be on the outside of the box when shipping internationally.