I just found this website from the Philippines with more information:
Hope this helps.
http://www.evergreenseeds.com/howtoorder.html had this information:
"The seed import rules are different in many countries which are set by their government. It is your responsibility to check your customs for the entry requirements, we can't guarantee for your customs entry. We can guarantee only that we will ship out your order from our end. There is no restriction in USA for exporting seeds to any foreign country. Most countries allow importing seeds in small packets/small quantity without any restrictions. However, many countries may require a phytosanitary certificate for importing seeds, paricularly in bulk quantity and commercial planting uses, into their country. This document is issued by US Department of Agriculature for exporting, after the seeds inspected/passed here"
So your FIL should probably check at that end to see what the restrictions are.
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