From an ANSI and real-world point of view, you cannot have laser safety without a person responsible for it. This is the role of the LSO. The LSO does not need to perform all of the LSO duties; rather, he or she is responsible for seeing that they are all addressed. The position itself does not need to be full time and commonly is just one of several hats that a person wears. If staff has access to Class 3B or Class 4 lasers, an LSO is required. This includes work on enclosed laser systems that contain Class 3B or Class 4 lasers. (Note: in case of a regulatory inspection, the first person inspectors will ask to speak to is the LSO.)
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