These Regulations require persons with custody or control of a crop being made into silage, of livestock slurry or of certain fuel oil to carry out works and take precautions and other steps for preventing pollution of inland or coastal waters. The principal changes respect to past legislation are: (a) to redefine the meaning of the term "silage" as "any forage crop which is being, or has been, conserved by fermentation or preservation (including the use of additives), or both, and which is inte