The sea lice levels referred to in the Code of Good Practice are suggested criteria at which producers should consider treatment to prevent build up of gravid female sea lice They are not a regulatory standard and have no bearing in the regulation of sea lice for fish health purposes.The Scottish Government’s approach to sea lice management is set out in the document entitled The Sea Lice Regulation in Scotland’ This includes the level of sea lice per fish at which the Fish Health Inspectorate will intervene or take enforcement action.