(a) A physician in a Clinical Center of Excellence or a member of the nationwide provider network shall promptly transmit to the WTC Program Administrator a diagnosis and the basis for the diagnosis of a WTC-related health condition or health condition medically associated with a WTC-related health condition. The physician's diagnosis shall be made based on an assessment of the following:
(1) The individual's exposure to airborne toxins, any other hazard or any other adverse condition resulting from the September 11, 2001, terrorist attacks.
(2) The type of symptoms experienced by the individual and the temporal sequence of those symptoms.
(b) For a health condition medically associated with a WTC-related health condition, the physician's determination shall contain information establishing how the health condition has resulted from treatment of a previously certified WTC-related health condition or how it has resulted from progression of the certified WTC-related health condition.