From their site
In lieu of a handful of states such as CA, TX, MA implementing state laws requiring age verification on tobacco sales made online, we are required by law in those states to ensure that certain items here at LightningVapes.com are delivered to adults of legal smoking age in their respective state. Furthermore with the recent FDA regulations passed regarding electronic cigarettes, we will be implementing this nation wide, and expect the industry to follow suit come August of 2016.