Within Design Requirements for (UK) Service Aircraft (AvP970) the aircraft designer is given advice on the selection of metallic materials based on their resistance to corrosion; the designer is also presented with mandatory requirements for processes and materials used in the protection of aircraft structures. The philosophy behind this approach is discussed and the various corrosion control requirements are described. While the protective schemes currently used on aircraft structures are generally satisfactory it will probably be necessary to find replacements for cadmium (for the protection of steel), for chromates (for inhibition of corrosion, especially when incorporated in paint films), and various metal finishing operations, because of the pressure of current and future legislation aimed at protecting the environment. The impact of such legislation is discussed, together with possible solutions, based on current research work in the UK.