A long-delayed centerpiece of the Dodd-Frank Act, restrictions on high-risk trading by government-insured banks known as the “Volcker Rule,” will be voted on by regulatory agencies on Tuesday, Dec. 10.

The Commodity Futures Trading Commission, Federal Reserve, Office of the Comptroller of the Currency, and Federal Deposit Insurance Corp. have scheduled meetings on that date to consider a proposed rule circulated among regulators earlier this month. The Securities and Exchange Commission, which also must approve the rulemaking, has not yet scheduled a vote but is expected to do so soon.

Crafting the rule has been a more arduous process than Volcker Rule advocates had hoped for. Difficulty defining the distinction between prohibited proprietary trading and allowable hedging has particularly complicated the rulemaking. Behind-the-scenes debates between those regulators seeking a stronger, more restrictive rule versus others who want a more measured approach have raged on for many months, as well.