Presumptions relating to certain diseases

§ 312. Presumptions relating to certain diseasesFor the purposes of section 310 of this title, and subject to the provisions of section 313 of this title, in the case of any veteran who served for ninety days or more during a period of war— (1) a chronic disease becoming manifest to a degree of 10 per centum or more within one year from the date of separation from such service; (2) a tropical disease, and the resultant disorders or disease originating because of therapy, administered in connection with such diseases, or as a preventative thereof, becoming manifest to a degree of 10 per centum or more within one year from the date of separation from such service, or at a time when standard or accepted treatises indicate that the incubation period thereof commenced during such service; (3) active tuberculous disease developing a 10 per centum degree of disability or more within three years from the date of separation from such service; (4) multiple sclerosis developing a 10 per centum degree of disability or more within two years from the date of separation from such service; shall be considered to have been incurred in or aggravated by such service, notwithstanding there is no record of evidence of such disease during the period of service.