In 1996, the US Personal Responsibility and Work Opportunity Act removed Medicaid benefits for resident foreigners from the states, even after the five-year waiting period that most other resident aliens have. However, in December 2020, Congress restored Medicaid for Compact of Free Association communities. Military provisions The COFA allows the United States to operate armed forces in Compact areas and to demand land for operating bases, subject to negotiation, and excludes the militaries of other countries without US permission. The US in turn becomes responsible for protecting its affiliate countries and responsible for administering all international defense treaties and affairs, though it may not declare war on their behalf. It is not allowed to use nuclear, chemical, or biological weapons in Palauan territory. In the territories of the Marshall Islands and the Federated States of Micronesia it is not allowed to store such weapons except in times of national emergency, state of war, or when necessary to defend against an actual or impending attack on the US, the Marshall Islands, or the Federated States of Micronesia. Citizens of the associated states may serve in America's armed forces, and there is a high level of military enlistment by Compact citizens. For example, in 2008, the Federated States of Micronesia had a higher per-capita enlistment rate than any US state, and had more than five times the national per-capita average of casualties in Iraq and Afghanistan: 9 soldiers out of a population of 107,000. 21st-century renewal and updates In 2003, the compacts with the RMI and FSM were renewed for 20 years. These new compacts provided US$3.5 billion in funding for both countries. US$30 million will also be disbursed annually among American Samoa, Guam, Hawaii, and the Northern Mariana Islands in "Compact Impact" funding. This funding helps the governments of these localities cope with the expense of providing services to immigrants from the RMI, FSM, and Palau. The US use of Kwajalein Atoll for missile testing was renewed for the same period. The new compacts also changed certain immigration rules. RMI and FSM citizens traveling to the US are now required to have passports. The US Postal Service was given the option to apply international postage rates for mail between the US and RMI/FSM, phased in over five years. The USPS began implementing the change in January 2006, but decided to resume domestic services and rates in November 2007. The renewed compact,