§ 170.315(f)(1) - Transmission to immunization registries

§ 170.205(e)(4) HL7 2.5.1 Implementation Guide for Immunization Messaging, Release 1.5, October 1, 2014

§ 170.205(e)(4) HL7 Version 2.5.1 Implementation Guide for Immunization Messaging (Release 1.5) - Addendum, July 2015