Just like permission schemes, project administrators apply issue security schemes to projects. Applying an issue security scheme is similar to applying a workflow scheme, where there is an intermediate migration step involved. This is to ensure that existing issues with set issue security levels can be successfully migrated over to the new security levels in the scheme:

1. Browse to the project administration page you want to apply the workflow scheme to
2. Select the Issue Security option from the left-hand panel
3. Select the Use a different scheme option form the Actions menu
4. Select the permission scheme to use
5. Click on the Next button to move to step 2 of the process
6. Select the new security level to apply to the existing issue that may be affected by this change
7. Click on the Associate button to apply the new issue security scheme