The question concerning about the length of validity for alcohol certification is a good question. It is often asked but, within your state, any trainer or vendor of alcohol certification can't give you a good clear answer. The length of the certification is not determined by any trainer or vendor. Rather, it's determined by either the city, municipality, or liability insurance carrier for the location at which you serve alcohol that will determine the length of the validity.
Check with your manager and ask about alcohol certification in their area. They may have a better idea of length of certification, especially from their liability insurance carrier. If you are not working at this time, you'll want to check with city clerk's office where you will be serving alcohol. The length of the certification is the same for all branding of alcohol certification.