Employer discount question

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http://forums.androidcentral.com – Im on a family share plan with unlimited data that is month to month and when we signed the contract my wife's line was main line bc her employer discount was higher than mine. But if I now get a higher employer discount and wanted to make my line the main line, would they try to pull something saying I have to get a whole new family shared data plan now thus voiding out our existing plan? Thoughts? On side note...just read article stating vzw will start to ask for proof of employment starting April 1st and if u don't have proof u will have 60 days which means June 1st will be some peopl (HowTos)