The ISPM 15 regulations are the international standard overseen by the Forestry Commission in the UK. Their purpose is to prevent the spread of wood boring pest infestation in home-grown timber by imported timber. The standard is operated on a reciprocal basis in most countries, without the approved stamp on packaging acceptance through any points of entry will be refused.
In order to be granted approved status timber packaging manufacturers must be audited twice yearly and are issued with a discrete number which must be clearly marked as part of the standard 'stamp' on every container destined to be shipped internationally. The format of these stamps is universally accepted through ports of entry.