This is used in Open Enrollment when there are Plan Dependencies setup.  During edits of OE (i.e. on WEBOEE/WEBOEE_FLEX), Coverage choices made in Primary Plans will change the selections available in Secondary Plans.  Choices made will be validated and warnings issued if Employee has not made required selections. 
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This is a toggle used to determine if the employee has to select the [Secondary Plan|SECONDARY_PLAN] or not.\\- If the toggle is ON, then the employee does NOT have to select the [Secondary Plan|SECONDARY_PLAN], however, if they do, they must choose from the Coverage options noted in the Dependencies table.\\- If the toggle is OFF, then the employee MUST choose from the Secondary Plans/Coverages noted.
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![Notes|Edit:Internal.PLAN_OPTIONAL] 	
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