Practice of Chiropractic Medicine ; Revises definition of term "practice of chiropractic medicine"; authorizes chiropractic physicians to possess, for emergency purposes only at chiropractic physician's office or place of business, prescription medical oxygen; authorizes chiropractic physicians to order, store, possess, prescribe, & administer, only by means of injection at chiropractic physician’s office, sterile substances, including vitamins, minerals, & nutritional supplements; prohibits chiropractic physicians from administering certain sterile substances by means of injection unless he or she has been certified by board; prohibits chiropractic physicians from administering certain any substance through intravenous therapy; requires chiropractic physician to be certified before administering sterile substances in specified manner; requires Board of Chiropractic Medicine to establish minimum standards of practice for administration of certain sterile substances by means of injection by chiropractic physicians; provides requirements for such standards; requires board to issue chiropractic physician letter certifying that he or she is authorized to administer specified sterile substances by means of injection under certain conditions.