EPA proposes revisions to the NPDES regulations to eliminate regulatory and application form inconsistencies; improve permit documentation, transparency and oversight; clarify existing regulations; and remove outdated provisions. These proposed regulatory changes cover 15 topics in the following major categories: permit applications; the water quality-based permitting process; permit objection, documentation and process efficiencies; the vessels exclusion; and the CWA section 401 certification process. Comments must be received on or before 18 July 2016. POC is Erin Flannery-Keith, Water Permits Division, Office of Wastewater Management, Mail Code 4203M, EPA, 1200 Pennsylvania Ave. NW., Washington, DC 20460; 202-566-0689; firstname.lastname@example.org (Federal Register; 18 May 2017 [Proposed Rules], pages 31343-31374).