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What does OPERREQ stand for?

OPERREQ stands for Operator Request

This definition appears very rarely

Samples in periodicals archive:

WinDOT also now features the following: all federal and state pipeline safety regulations; all federal interpretations, including operator request letters not previously available; a complete history of each Part that shows every amendment and how it changed the regulations; and all rulemaking documents from the start of federal regulations, (ANPRM, NPRM, and Final Rules).