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As described in the Catalogue Onboarding Process ancillary document,
“8“8.1 An Associated Service is a service associated with the implementation or optimisation of a Catalogue Solution. It is optional for a Supplier to offer Associated Services and buyers cannot be required to purchase an Associated Service. Associated Services will be one-off services, for example, training, or set up. The cost of an Associated Service is not included in the Periodic Service Charge, and may be in a form different from Periodic Service Charge (e.g. a unit of order).”
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