Eliminating kicker position -voting question

Commish of a 12 person league hoping to eliminate kickers moving forward, and was gonna put it to vote. For something like that, would a simple majority of 7-5 vote (at least) would suffice to eliminate them, or would something like has to be 8-4 at least?

Also, just curious if you guys usually do something like this this month or do you wait until the August before the draft?