Where an injured worker has been prescribed a medication or drug prior to receiving the notifications required by section 440.4 of this Part, the injured worker may continue to have the prescription refilled at the pharmacy from which it was originally dispensed. Upon receiving written notification under section 440.4 of this Part that the self-insured employer or insurance carrier requires an injured worker to obtain all prescription medications from a designated independent pharmacy or pharmacies, chain pharmacy or pharmacies, or from a pharmacy affiliated with a designated pharmacy benefit manager, the injured worker shall transfer any prescriptions for controlled and non-controlled substances or medications to a designated pharmacy at such time as all refills for that prescription are exhausted, or within 90 days following such notification for controlled substances and 60 days following such notification for non-controlled substances, whichever occurs first.