Scotland has published a dry-sounding constitutional order that matters far beyond Whitehall drafting rooms. The measure was made on 14 October, laid before both Westminster and Holyrood on 16 October, and is due to take effect on 5 December 2026. It amends the 2019 framework put in place as forestry responsibilities were settled after devolution, and broadens the forestry and tree-health functions that can be exercised through section 93 arrangements. (policyindex.ai) For readers outside constitutional law, section 93 of the Scotland Act 1998 allows specified functions to be exercised on behalf of another administration without changing who remains responsible. In plant health, that matters because pests do not stop at administrative borders, and official controls often depend on fast co-ordination between agencies. (legislation.gov.uk)

The new order pulls more forestry work into that shared-function space. According to the published text and explanatory note, it adds forestry functions linked to plant-pest protection and official controls, and inserts a wider catch-all covering the monitoring and control of tree pests, the promotion of tree health, the movement of forestry material and the regulation of forestry professional operators. It also removes a reference to section 44 of the Climate Change (Scotland) Act 2009 because, as the explanatory note says, there are no section 44 functions that could be exercised through section 93 arrangements. (policyindex.ai) Translated into everyday forestry language, this is about how wood, bark, trees and the businesses that move or treat them sit within Scotland’s plant-health system. These are the quiet points in the supply chain where biosecurity either works or weakens. (policyindex.ai)

That matters because the forestry asset at stake is large. Forest Research says woodland covered 19% of Scotland’s land area at 31 March 2025, and Scottish Forestry’s latest strategy progress report says the sector contributed £1.1 billion in GVA and supported 34,000 full-time equivalent jobs in 2024. Healthy trees support timber supply, carbon storage, habitat and rural employment all at once. (forestresearch.gov.uk) The risk is not abstract. The Scottish Government says plant health policy is designed to prevent pests and diseases becoming established, and its current plant health strategy covers forestry alongside farming, horticulture and the wider natural environment. In a separate adaptation assessment, ministers cited indicative damage from pests, invasive species and non-native species of about £240 million a year to the Scottish economy. (gov.scot)

Scottish Forestry’s own guidance shows what official control looks like on the ground. Statutory Plant Health Notices can require land managers to remove host trees, chip or debark felled timber on site, tighten biosecurity and confirm when the work is done. A tidier legal route for shared functions will not remove a single infected tree by itself, but it should make urgent action easier to organise when agencies need to move quickly. (forestry.gov.scot) The threat picture is current, not historical. Scottish Forestry highlights active concerns including ash dieback, Phytophthora ramorum, Phytophthora pluvialis and the great spruce bark beetle spreading north in Scotland, while Forest Research says biosecurity remains a high priority as the UK has seen increased spread and detections of tree pests and diseases in recent years. (forestry.gov.scot)

The order is also notable for what the published note says it is: a specifications amendment to the 2019 order, not a new frontline biosecurity package. The explanatory note says no full impact assessment was produced because no, or no significant, effect on the private, voluntary or public sector was foreseen. Scottish Parliament committee papers had already recorded a long-standing commitment to bring forward a further Westminster order to amend the 2019 instrument. (policyindex.ai) That official view may be legally tidy, but the environmental value is still real. When rules around inspections, movement controls and operator oversight are clarified, the likely gain is fewer grey areas when pests travel through timber, packaging or plant movements. That final point is an inference from the section 93 mechanism and from the way current plant-health controls are organised across Great Britain. (legislation.gov.uk)

The bigger test comes after 5 December. Scottish Forestry already urges land managers, contractors and visitors to clean vehicles, boots and equipment, follow movement restrictions, monitor trees regularly and use TreeAlert to report suspected problems. Good law helps, but early detection and routine site discipline still do much of the daily work of tree protection. (forestry.gov.scot) The signal from this order is straightforward: constitutional housekeeping can still carry climate and nature value. Scotland is continuing to create new woodland, and its forestry strategy treats resilience to pests and disease as a standing priority. Making sure the legal plumbing matches that task is not the whole answer, but it is one sensible step before the next outbreak tests the system again. (forestry.gov.scot)