Marine mode rule set custom tests are specified as part of the rule set view style definition using Tools > Define View Style in the Drawings and Reports task. The number and type of tests available depends on the source object type selected on the Actions tab of the Edit Ruleset View Style dialog box, as part of the rule set view style property definition. For more information, see Actions Tab (Edit Ruleset View Style Dialog Box).
In the Edit Ruleset View Style dialog box, you can assign a custom test to each action (a row on the grid) by clicking Edit in the Custom field. Edit displays the Custom Tests dialog box.