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Standards History
NBIC NB23-3   2023   Repairs And Alterations 50 $
NBIC NB23-3   2021   Repairs And Alterations 30 $
NBIC NB23-3   2019   Repairs And Alterations 30 $
NBIC NB23-3   2017   Repairs And Alterations 30 $
NBIC NB23-3   2015   Repairs And Alterations 30 $
NBIC NB23-3   2013   Repairs And Alterations 20 $
NBIC NB23-3   2007   Repairs And Alterations 10 $