"Best interest" means that:
(a) The individual is physically capable of procreating;
(b) The individual is likely to engage in sexual activity at the present or in the near future under circumstances likely to result in pregnancy;
(c) All less drastic alternative contraceptive methods, including supervision, education and training, have proved unworkable or inapplicable, or are medically contraindicated;
(d) The proposed method of sterilization conforms with standard medical practice, is the least intrusive method available and appropriate, and can be carried out without unreasonable risk to the life and health of the individual; and
(e) The nature and extent of the individual's disability, as determined by empirical evidence and not solely on the basis of standardized tests, renders the individual permanently incapable of caring for and raising a child, even with reasonable assistance.