The U.S. Department of Labor has sent the White House the final version of rules that will make it easier to include cryptocurrencies, real estate and stakes in private companies in 401(k) retirement plans.

The document was submitted for final review on November 5. The agency had previously presented the draft regulation on March 30.

The new rules provide legal protection for pension plan managers who meet six criteria: returns, fees, liquidity, asset valuation, benchmarks and investment complexity.

The document has not yet been approved, but its submission to the White House signals that final adoption is approaching.