Final answer:
A prescription for Butrans can be refilled within 6 months from the date it was written, according to federal law.
Step-by-step explanation:
According to federal law, a prescription for Butrans can be refilled within 6 months from the date it was written., meaning it can be refilled up until December 30, 2021. This is because federal law typically allows prescriptions for controlled substances to be refilled up to six months from the date they were issued.