According to the Office of the United States Trade Representative, the "TPP includes the most robust enforceable environment commitments of any trade agreement in history". The USTR notes that the TPP requires signatories to fulfill their obligations under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) to protect and conserve iconic species. According to the USTR, TPP is the first trade agreement to prohibit harmful fisheries subsidies, such as those that contribute to overfishing. The USTR asserts that TPP signatories are required to "combat illegal fishing", "promote sustainable fisheries management practices", and "protect wetlands and important natural areas", "combat wildlife trafficking, illegal logging, and illegal fishing" and "protect the marine environment from ship pollution, including by implementing their obligations under MARPOL (an international agreement to prevent marine pollution)".