# The Planning (Hazardous Substances) (Wales) Regulations 2015, Paragraph 18: Interpretation of this Schedule

Extent: E+W

In this Schedule—
“establishment period” (“cyfnod sefydlu”) means the period of 12 months ending on—
(a)4 September 2015; or
(b)(if later) the date on which hazardous substances consent was first required for the relevant substance;
“relevant minor change” (“mân newid perthnasol”) means a change to the quantity or type of hazardous substances present in, on or under land in relation to which there is a hazardous substances consent, where hazardous substances consent would be required for that change but for this Schedule;
“safety hazard change” (“newid o ran perygl diogelwch”) means a change to an area notified to a local planning authority by the Health and Safety Executive or the Office of Nuclear Regulation for the purposes of paragraphs (c) or (ca) of the Table in Schedule 4 to the Town and Country Planning (Development Management Procedure) (Wales) Order 2012 , where that change results in—
(a)that area encompassing land which it did not previously encompass; or
(b)where the notification of that area included the identification of zones within that area corresponding to levels of risk, the expansion of any such zone.

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Source: https://www.legislation.gov.uk/wsi/2015/1597/schedule/2/paragraph/18 (the official version)
Page: https://openlegislation.uk/planning-hazardous-substances-wales-regulations-2015/schedule-2/paragraph-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.