I was looking around trying to find a limit on Cll scripts.

I found this:
07-04-0004--TIME LIMIT ON A NEW SCHEDULE II PRESCRIPTION Prescriptions written for Schedule II controlled substances may be dispensed up to six (6) months from the date written if the pharmacist is certain of the validity of the prescription. An exception to this would be prescriptions written for a patient classified as terminally ill or a long-term-care facility patient and these prescriptions are valid for 60 days from date of issue and may be partially filled. (2/15/95, Amended 10/14/97)

The above is from
arkansas

I assume if Arkansas has a 6 month time limit - then federal law must at the least allow 6 months.