Anesthesia qualifying circumstance codes

Anesthesia coding with use of Qualifying Circumstances. With the use of the qualifying circumstance codes; 99100 for patient over 70, her I am seeing some opinions of if the patient turned 70 yesterday she is over 70. I personally would say she would need to be 71 to use this code (as long as the code description does not state age). What are your thoughts and is there somewhere to go for more black and white description.

Thanks have a great weekend

Anesthesia qualifying circumstance codes