This legislation will place restrictions in the UK on the use and placing on the market of mixtures containing certain hazardous substances for tattooing procedures and Permanent Make Up (PMU) treatments. The restriction will apply concentration limits to substances classified in the GB mandatory classification and labelling list as: Carcinogen category 1A, 1B and 2; Germ cell mutagen category 1A, 1B and 2; Reproductive toxicant category 1A, 1B and 2; Skin sensitising category 1, 1A and 1B; Skin corrosive category 1, 1A, 1B and 1C substances; and Serious eye damaging category 1 substances. Restriction conditions will also apply to substances listed in Annexes 2 and 4 of the Cosmetic Product Regulations, that are prohibited from use in cosmetics. The restriction will also apply labelling requirements to mixtures for tattooing purposes with substances in scope of the restriction. This includes specific labelling requirements to clearly communicate the use of pH regulators, as well as allergen warnings for mixtures containing nickel or chromium (VI).