The Poisons Act 1972 (Explosives Precursors) (Amendment) Regulations 2018. Comes into force 3rd April. These Regulations amend Schedule 1A to the Poisons Act 1972 (c. 66) to include sulfuric acid in the list of regulated explosives precursors (above 15% wt for wt), aluminium powders and magnesium powders (each above a concentration threshold of 70%, with a particle size less than 200μm), and magnesium nitrate hexahydrate in the list of reportable explosives precursors.