Having both H4 to H1

Hi,

I applied H1B which got approved on June 15, 2014. I applied H4 from my wife’s company which got approved during May, 2014 and it is valid until October 2015. As per the last action rule please let me know which of the two be valid starting 1st October 2014. Will COS be required to change from H4-to-H1 or no action is required?