In order to obtain a CSC plate, the shipping container needs to be tested by a qualified individual who will confirm that the unit is structurally sound both to ship and to accept the weight of cargo stated on the decals on the doors of the container. CSC verification generally costs around £50 to carry out and usually lasts for a minimum of 12 months and a maximum of 36 months, meaning that the container must be shipped in the stated timespan for the plate to remain valid. If you require verification for up to 36 months you should make it clear to your supplier as 12 months validity is the industry standard.