Requirement specification; User specification

All requirements specified by the client in a contract for all items (products including services) to be provided by the contractor translated from aus DIN 69905:1997-05 (see also functional specification)

Reference Volume (and volume-specific, additional or differing definitions to the standard):
VDA volume 4.3
VDA Band 6.4
Requirements from the user's standpoint, including all peripheral conditions must be described in the requirements specification. These requirements should be quantifiable and capable of being checked. The requirements specification defines what kind of task is to be carried out and why it is to be resolved.

VDA Volume 13 (no English version available)
Document in which a description is given of the requirements for a product/ performance, from the user's standpoint, including all peripheral conditions.