(a) The contracting office is responsible for ensuring that all contracts and modifications are written in such a manner that all quantities, items, tasks, services, etc., required by the contract or modification can be related to specific accounting data cited in the contract or modification.
(b) Shipping instructions issued under a contract or modification should identify the Contract Line Item Number (CLIN), Subline Item Number (SLIN) and Accounting Classification Reference Number (ACRN), which will permit identification of the accounting classification to which each quantity of each item, service, or task, is properly chargeable. To facilitate proper payment, contracts should require that the contractor cite the CLIN, SLIN, and ACRN, reflected in the shipping instructions, on applicable invoices.
