NFPA 520: Standard on Subterranean Spaces
Current Edition: 2010 Next Edition: 2016

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Revision cycle information
Revision Cycle: Annual 2015
Revised Edition Date: 2016
First Draft (previously Report on Proposals (ROP))
Public Input Closing Date: 1/4/2013  
First Draft Report Posting Date: 8/19/2013 First Draft Report
First Draft Meeting Notices
First Draft Meeting Agendas
First Draft Meeting Minutes
First Draft Ballot (previously ROP Ballot)
Ballot Email (PDF, 66 KB)
Public Input Report (PDF, 88 KB)
First Revisions Report (PDF, 16 KB)
Ballot Final (PDF, 123 KB)
Second Draft (previously Report on Comments (ROC))
Public Comment Closing Date for Online Submission: 11/15/2013
Public Comment Closing Date for Paper Submittal: 10/11/2013
Paper Submittals are considered any submission other than the online submission system
Second Draft Report Posting Date: 6/10/2014 Second Draft Report
Second Draft Meeting Notices
Second Draft Meeting Agendas
Second Draft Meeting Minutes
Second Draft Ballot (previously ROC Ballot)
Ballot Email (PDF, 49 KB)
Ballot Final (PDF, 324 KB)
Motions Committee Report (NITMAM)
NFPA.DocInfo.Model.Description
NITMAM Closing Date: 8/22/2014
NITMAM Posting Date: 10/17/2014 Motions Committee Report (PDF, 3 MB)

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