# The Smoke Control Areas (Authorised Fuels) (England) (No. 2) Regulations 2014, Paragraph 39

Extent: E+W+S

Island Lump and Island Nuts, manufactured by Unocal Refinery of California, the United States of America, which—
(a) comprise petroleum coke;
(b) were manufactured from the petroleum coke by a process involving heat treatment and steam injection;
(c) are unmarked random shapes;
(d) have an average weight of 80 grams (per briquette of Island Lump) or 30 grams (per briquette of Island Nuts); and
(e) have a sulphur content not exceeding 2% of the total weight.

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Source: https://www.legislation.gov.uk/uksi/2014/2366/schedule/paragraph/39 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-england-no-2-regulations-2014/schedule/paragraph-39
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.