Last, but not least, you can now put on your project administrator's hat and apply your new permission scheme to your HR project:

1. Browse to the project administration page for your HR project
2. Click on the Permissions option and select your new HR Permission Scheme
3. Click on the Associate button

By associating the permission scheme with your project, you have applied all your permission changes. Now, if you create a new issue or edit an existing issue, you will notice that the list of assignees will no longer include all the users in Jira.