Memorandum of understanding signed at Washington September 29, 1997; entered into force September 29, 1997. With appendix.
Agreement extending the memorandum of understanding. Effected by exchange of notes at Washington September 20 and 23, 2002; entered into force September 23, 2002.
Agreement extending and amending the memorandum of understanding, as extended. Effected by exchange of notes at Guatemala August 23 and 24, 2007; entered into force August 24, 2007.