www.thinkprogress.org/economy/2014/04/15/3426716/oklahoma-ban-minimum-wage-paid-sick-leave/
"At a time when many states and cities are working passing minimum wage increases, Oklahoma Gov. Mary Fallin (R) has gone in the opposite direction and signed a law banning cities from passing higher wages. The bill also bans them from enacting paid sick days or vacation requirements."