What makes a requirement binding here
The Control of Drugs and Cosmetics Regulations 1984, which carry both product registration and establishment licensing. A manufacturer of registered products holds a Manufacturer’s Licence, which also permits it to sell by wholesale or supply those products — the two permissions that are separate in many markets arrive together here.
Through the Manufacturer’s Licence granted under the 1984 Regulations, and through registration of each product. The national pharmaceutical regulatory agency sits inside the health ministry and does both: it registers the product and licenses the premises that make it, so a question raised in one process is visible in the other.