The headmounted computer system is still in its early days but it’s starting to become more prominent, and its ability to let people surreptitiously record video and take photos has sparked questions about what’s appropriate.

Some businesses have banned Glass. In other places, the question remains: Am I allowed to use Glass here?

If it’s a place where cellphone cameras aren’t allowed, then the same rules apply to Glass, Google said in its guidance, which is aimed at the early adopters in its Explorers program. So if you’re asked to turn your phone off, you should turn Glass off too.

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