Upgrading your License Using Right-To-Use Features
Beginning with Cisco IOS Release 15.0(2)SE1, the switches support right-to-use licensing. The right-to-use licensing model is an easier method to upgrade or downgrade from one license level to another without having to interact with the Cisco Product License Registration portal.
If you want to upgrade or downgrade from one license level to another, or remove the license from one switch and install on another, we recommend that you use the right-to-use (RTU) license instead of the node-locked license.
link:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_53_se/configuration/notes/ol19813.html
HTH
