# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 45


In this Chapter—
“clay” includes a blend of clay with ash, sand or other materials,
“refractory” means refractory material (such as fireclay, silica, magnesite, chrome-magnesite, sillimanite, sintered alumina, beryllia and boron nitride) which is able to withstand high temperatures and to function as a furnace lining or in other similar high temperature applications,
“retail sale” means sale to the final customer.

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/26/part/3/paragraph/45 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-26/part-3/paragraph-45
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.