This rule proposes to set “topple in place” as the default decommissioning standard, on the condition that such circumstances meet U.S. Coast Guard navigational requirements. This proposed rule would also address issues that may include to 1) idle iron by adding a definition of this term to clarify that it applies to idle wells and structures on active leases; 2) abandonment in place of subsea infrastructure by adding regulations addressing when BSEE may approve decommissioning-in-place instead of removal of certain subsea equipment; 3) BSEE approval for platform or facility toppling in place; and 4) other operational considerations.