The European Parliament has signalled a tough approach to GM food labelling in a move that could provoke a major lobbying campaign by food manufacturers this summer. The parliament's environment committee is insisting on a raft of amendments to proposed EU legislation that would require warnings such as "this product is derived from an animal fed with GM feed" in all labelling and advertising where GMOs are involved. Other amendments demand that, in order to ensure the traceability of animals fed with GM feed, a period of ten years (rather than five) is necessary to ensure that operators' records are properly maintained and that for accidental contamination with authorised GMOs, the proposed threshold should be reduced from 1%  to 0.5%.