(a) Vaccines administered after September 1, 1991, shall include the month, day, and year each vaccine was administered.(b) Documentation of vaccines administered that include the signature or stamp of the physician or physician's designee, or public health personnel, is acceptable. Immunization records generated from electronic health record systems must include clinic contact information and the provider's signature/stamp.(c) An official immunization record generated from a state or local health authority is acceptable.(d) An official record received from school officials, including a record from another state, is acceptable.