What happens if a new Reference Standard specified in a monograph is not yet available from USP?
Requirements in any new standards, tests, or assays in the USP–NF will not go into effect unless the specified USP Reference Standards are available from USP. The availability of new Reference Standards and the official dates of the USP–NF standards, tests, or assays requiring their use are announced in USP–NF or its Supplements, or in the Interim Revision Announcements published in USP’s Pharmacopeial Forum journal. To learn when a particular, new, first time Reference Standard becomes available, use the New Reference Standards Release Notification Program.
