; and (D) performs such activities as a primary responsibility of his or her job. . (b) Presumption relating to employees in fire protection activities Section 8102 of title 5, United States Code, is amended by adding at the end the following: (c) (1) With regard to an employee in fire protection activities, a disease specified in paragraph (3) shall be presumed to be proximately caused by the employment of such employee, subject to the length of service requirements specified. The disability or death of an employee in fire protection activities due to such a disease shall be presumed to result from personal injury sustained while in the performance of such employee’s duty. Such presumptions may be rebutted by a preponderance of the evidence. (2) Such presumptions apply only if the employee in fire protection activities is diagnosed with the disease for which presumption is sought within 10 years of the last active date of employment as an employee in fire protection activities. (3) The following diseases shall be presumed to be proximately caused by the employment of the employee in fire protection activities: (A) If the employee has been employed for a minimum of 5 years in aggregate as an employee in fire protection activities: (i) Heart disease. (ii) Lung disease. (iii) The following cancers: (I) Brain cancer. (II) Cancer of the blood or lymphatic systems. (III) Leukemia. (IV) Lymphoma (except Hodgkin’s disease). (V) Multiple myeloma. (VI) Bladder cancer. (VII) Kidney cancer. (VIII) Testicular cancer. (IX) Cancer of the digestive system. (X) Colon cancer. (XI) Liver cancer. (XII) Skin cancer. (XIII) Lung cancer. (iv) Any other cancer the contraction of which the Secretary of Labor through regulations determines to be related to the hazards to which an employee in fire protection activities may be subject. (B) Regardless of the length of time an employee in fire protection activities has been employed, any uncommon infectious disease, including but not limited to tuberculosis, hepatitis A, B, or C, the human