The standard loan terms include a fee of up to US$1,000,000 per year and a provision that any cubs born during the loan be the property of the People's Republic of China. Since 1998, because of a World Wildlife Fund lawsuit, the U.S. Fish and Wildlife Service allows a U.S. zoo to import a panda only if the zoo can ensure that China will channel more than half of its loan fee into conservation efforts for wild pandas and their habitat. The gifting of two pandas to Hong Kong in 2007 was seen as outside of the spectrum of panda diplomacy.[9]