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 field determines if there is a Secondary Plan associated to the Primary plan. If this field contains a Benefit Plan, then the employee must select this plan when they have chosen the Primary Plan/Coverage.

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![Notes|Edit:Internal.SECONDARY_PLAN] 	
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