You don't triple fill all at once. The doctor calls in one prescription for, say January, then one prescription for February, then one for March. You have to go to the pharmacy each month, but the doctor only 4 times a year. Basically the doctor can prescribe a prescription that doesn't start until a certain time. So the start time on the three prescriptions differs.
That's how it's done in FL for non-opioid schedule II. None of our Dr's can call or transmit Schedule II Rx, they have to be hand carried paper scripts.
Opioids are limited to a 3 day supply tho (with some tight exceptions, for those patients that can afford a PM Dr).