While it is true that NFPA 70E is not an "enforceable" standard, OSHA does REQUIRE that all employers have a written policy/program of electrical safety, that all employees are trained on it, and that qualified electrical workers are trained in specific minimum intervals. That program CAN be a "roll your own" policy, but OSHA highly suggests using NFPA 70E as the template.
But here's how it works in reality. IF there is an accident involving electrical equipment and someone is hurt, OSHA will come in and the first thing they will want is a copy of the company's safe electrical work policy, along with records of every electrical worker having received the minimum required training. If the manager / supervisor responds "What policy?", they may end up going to jail (ignorance of the law is no excuse). If you DO have a policy, it had better look an awful lot like NFPA 70E, because that is the standard that OSHA recommends. In other words your company can ignore NFPA 70E at their own risk, including civil and criminal liability. Most companies just find it simpler to adopt NFPA 70E as their policy, it makes OSHA a lot less adversarial if they have to come in to investigate an accident.
Per the NEC though, per 110.16 Arc Flash Hazard labels are required for all panels that are "likely to require examination, adjustment, servicing, or maintenance while energized...", which is basically anything with a breaker, fuse or controller. The label might just say there is no hazard because the kCal is so low, but it needs the label anyway.