I do not know of any requirement to repaint INTERIOR walls, interior paint tends to last a long time. EXTERIOR walls typically need to be repainted after 7 to 10 years, especially the original paint, due to weathering and fading. So IMHO, yes you can wait another 2 years to paint your interior walls.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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