Remove Appendix 4, p. 1 (and 2), dated 05/25/05; insert Appendix 4, p. 1 (and 2), dated 12/05/05.
Mode of access: Internet at the FAA web site. Address as of 4/1/09: http://www.airweb.faa.gov/Regulatory%5Fand%5FGuidance%5FLibrary/rgAdvisoryCircular.nsf/0/d5c33df04538b6658625718f0059fd4f/$FILE/150-5320%5F12c%5Fchg7.pdf; current access available via PURL.