Legislation to phase out the use of noisy percussive hammers (including diesel,steam and pneumatic hammers) in built-up areas was enacted in May 1997 for implementation early in 1998.

• 在楼宇林立地区逐步取缔高噪音撞击式打桩机(包括柴油、蒸气及气动打桩机)的法例，已在一九九七年五月制定，将于一九九八年初实施。