There is very little evidence on the long term health effect of smoking e-cigarettes be it first of second hand. This means that there is currently no legislation in place from the government regarding them. Companies have the choice of what they want to do regarding the smoking of e-cigarettes in the workplace and may choose to ban them like smoking. As a result it is advised to clearly state company policy so people are aware of the rules on that premises. This is best done by having signs which state clearly what the companies stance is regarding the use of electronic cigarettes on site.