You can export rules into a form that can be subsequently imported.
For any rule that is not a Trellix category, click the leftmost column of that rule to mark the rule for export. A checkbox appears indicating the rule is selected. You can select more than one rule for export. Once you select all the rules, click the Export Selected action to export those rules to a file. The format of this file is one that can be subsequently imported.
To import rules from a file, click the Import action.