Project Information Requirements (PIR) its a BS EN ISO 19650 term introduced to replace the PAS 1192 term Plain language questions (PLQ)

PLQ and PIR are both expressions of the high-level information needed by the client and/or their stakeholders to make key decisions concerning the project. The PIR, like the PLQ, are used to develop detailed and contractual EIR. However, PIR can also include non-technical requirements and therefore can be broader than PLQ.

The PAS 1192 term Plain language questions (PLQ) should not be used on projects where compliance to BS EN 19650 is required