Nearly four years after the bill was signed into law, almost half of the rules mandated by the Dodd-Frank Wall Street Reform and Consumer Protection Act have yet to be completed, according to a monthly report by Davis Polk & Wardwell as cited in the Wall Street Journal.

The Dodd-Frank Act, passed in July 2010 in response to the 2008 financial crisis, requires several regulatory agencies—among them the Federal Reserve, the Securities and Exchange Commission and the Commodity Futures Trading Commission—to write rules overhauling the financial industry. Derivatives, mortgage reforms and asset-backed securities offerings are among the categories to which the rules should apply.

However, rule makers have been impeded by industry opposition, which has greatly slowed the process. According to the Davis Polk report, which can be downloaded here, only 52 percent of the 398 mandated rules had been completed as of April 1. Regulators have missed the deadline for 128 others, which have either been proposed and not completed or have not yet been proposed. Ten rules with future deadlines have already been proposed while 54 with future deadlines have yet to be proposed.

The CFTC has completed 50 of the 60 rules for which it is responsible, and bank regulators have completed 69 of their designated 135 rules. The SEC has finalized 42 of its 95 rules, and has proposed but missed the deadline on 41.

There are some who are encouraged by the regulators’ progress, including the completion of the Volcker rule, which restricts securities trading by banks. The CFTC has also finished the majority of its rules reshaping the swaps market, the Wall Street Journal reports.