You were given Site Keys for product licensing.
As of the changeover to Broadcom most all mainframe contracts will be established with a Site Key.
LMP (Site) keys will be delivered to the technical contact upon contract establishment. Contract holders will still be governed by the terms of their paper contract (MIPS, MSU, etc). This has been done to improve the efficiency of Broadcom licensing staff.
A Site Key allows a user to run a product on any CPU, but the user must still be licensed for that product. Therefore, individual product keys will still be needed.
A Site Key can be used at a DR(Disaster Recovery) site since there is no CPU check, and therefore an EKG(Emergency Key) code is no longer required.
See section "Add Product License Keys".
Documentation reference for Common Services 15.0: CA LMP and CAIRIM