However your organisation is structured, your legal representative will bear the main legal responsibility and liability in relation to environmental protection.
However, he will not normally be the one operating environmental issues. Therefore, he has to delegate tasks and authority into the organisation. Only a clear, documented delegation of tasks and authorities will help to ensure that everybody knows what has to be done and who has to do it.
Tasks should not be delegated without authority. If somebody cannot decide about spending money to resolve, let's say, a wastewater problem, he cannot bear the responsibility in the case that a non-conformity is detected responsibility and authority must be linked.