A physician described by Section 169.002 may prescribe low-THC cannabis to a patient if:
(1) the patient is a permanent resident of the state;
(2) the physician complies with the registration requirements of Section 169.004; and
(3) the physician certifies to the department that:
(A) the patient is diagnosed with:
(i) epilepsy;
(ii) a seizure disorder;
(iii) multiple sclerosis;
(iv) spasticity;
(v) amyotrophic lateral sclerosis;
(vi) autism;
(vii) cancer;
(viii) an incurable neurodegenerative disease;
(ix) post-traumatic stress disorder; or
(x) a medical condition that is approved for a research program under Subchapter F, Chapter 487, Health and Safety Code, and for which the patient is receiving treatment under that program; and
(B) the physician determines the risk of the medical use of low-THC cannabis by the patient is reasonable in light of the potential benefit for the patient.