PUBLIC LAW 107-103—DEC. 27, 2001 115 STAT. 989 "(B) A medically unexplained chronic multisymptom illness (such as chronic fatigue syndrome, fibromyalgia, and irritable bowel syndrome) that is defined by a cluster of signs or symp- 1 toms "(C) Any diagnosed illness that the Secretary determines in regulations prescribed under subsection (d) warrants a presumption of service-connection.". (2) Subsection (c)(1) of such section is amended— (A) in the matter preceding subparagraph (A), by striking "for an undiagnosed illness (or combination of undiagnosed illnesses)"; and (B) in subparagraph (A), by striking "for such illness (or combination of illnesses)". (b) SIGNS OR SYMPTOMS THAT MAY INDICATE UNDIAGNOSED ILLNESSES.—(1) Such section is further amended by adding at the end the following new subsection: "(g) For purposes of this section, signs or symptoms that may be a manifestation of an undiagnosed illness or a chronic multisymptom illness include the following: "(1) Fatigue. "(2) Unexplained rashes or other dermatological signs or symptoms. "(3) Headache. "(4) Muscle pain. "(5) Joint pain. "(6) Neurological signs and symptoms. "(7) Neuropsychological signs or symptoms. "(8) Signs or symptoms involving the upper or lower respiratory system. "(9) Sleep disturbances. "(10) Gastrointestinal signs or symptoms. "(11) Cardiovascular signs or symptoms. "(12) Abnormal weight loss. "(13) Menstrual disorders.". (2) Section 1118(a) is amended by adding at the end the following new paragraph: "(4) For purposes of this section, signs or symptoms that may be a manifestation of an undiagnosed illness include the signs and symptoms listed in section 1117(g) of this title.". (c) EFFECTIVE DATE. —The amendments made by subsections 38 USC 1117 (a) and (b) shall take effect on March 1, 2002. note. (d) CLARIFICATION OF AUTHORITY TO PRESUME SERVICE- CONNECTION FOR ADDITIONAL DISEASES.— (1) Sections 1117(c)(2) and 1118(e) are each amended by striking "10 years" and all that follows through "of 1998" and inserting "on September 30, 2011". (2) Section 1603(j) of the Persian Gulf War Veterans Act of 1998 (38 U.S.C. 1117 note) is amended by striking "10 years" and all that follows and inserting "on October 1, 2010.". SEC. 203. PRESERVATION OF SERVICE CONNECTION FOR UNDIAGNOSED ILLNESSES TO PROVIDE FOR PARTICIPA- TION IN RESEARCH PROJECTS BY PERSIAN GULF WAR VETERANS. (a) AUTHORITY FOR SECRETARY TO PROVIDE FOR PARTICIPATION WITHOUT LOSS OF BENEFITS.— Section 1117 is amended by adding after subsection (g), as added by section 202(b), the following new subsection:
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