For any business they have Legal considerations that they have to think about. In this business the main legal considerations are to do with health and safety. For instance, when rigging, everything that is hing up in the air needs two ways of fixing it. This means it will have a clamp attaching it to a bar or truss, as well as a safety bong to keep it from falling to the ground, should the clamp fail.
Also every company should have public liability insurance, so should something go wrong, and someone attempts to sue you, your insurance company will cover it up to a certain cost. So for example Simply Stage is covered up to ten million pounds.
Also if Simply Stage were to play background music, they would have to make sure that the event has a licence to do so, and report all the songs that were played and how many times they were played so that the artists can be paid for doing so.