Ektron CMS400.Net Reference
There are two ways to select a rule. The first, check boxes, allows you to select a rule by clicking the check box. This method is used when turning a rule on or off in the Ruleset. Checked, the rule is active. Unchecked the rule is inactive.
The second, highlighting a rule, is used to when you want to work with the rule. For example, you want to add or remove a rule from a Ruleset. To highlight a rule, click its title. Once a rule is highlighted, it is ready for an action, such as Remove or Edit.