With this module you can easily disable registrar lock option for certain TLDs.
Copy the disable_registrar_lock folder in modules/addons/ to your WHMCS installation.
- In the WHMCS admin area navigate to Setup->Addon Modules.
- Find the module Disable Registrar Lock and activate it.
- Don't forget to configure the permissions!
- Navigate to Addons->Disable Registrar Lock.
- Select the TLDs you want to have the registrar lock option.
- Hit the save button.
- Check your client area