VA loan: what happens when you move out after one year to rent it

[Wendy Fate]

When using a VA loan or other "owner occupied" lending products, is it really legal to move out and use it as an investment property after one year? What about when the lender goes to pay the homeowner's insurance policy and notices that the premium increased substantially because it is no longer a primary residence, but a rental investment. Are you now out of compliance? Can they call the note, or anything? Is this a fine line or is it "just fine", as long as you stay a full year?

Can anyone using this strategy confirm their success?  Or lenders, who know the law, please advise?

 I appreciate any input.