Fidelity Investments and eight other firms have agreed voluntarily to use enhanced broker-dealer fee disclosures in a model developed by the North American Securities Administrators Association, NASAA announced Tuesday.

The eight companies that agreed to the disclosures are Prudential Financial, 1st Global, Cambridge Investment Research, Commonwealth Financial Network, FSC Securities Corp., Royal Alliance Associates, SagePoint Financial and Woodbury Financial Services.

They join LPL Financial, Morgan Stanley Smith Barney, Prospera Financial Services and Signator Investors, which had previously agreed to follow the expanded disclosure guidelines.

“The NASAA Model Fee Disclosure Schedule helps investors better understand and compare various broker-dealer miscellaneous account and service fees and to provide guidelines to make fee disclosure accessible and transparent," NASAA said in a prepared statement. "The working group’s goal is to develop meaningful account and service fee disclosure and transparency. They must be simple to read, easily accessible and helpful for retail investors to understand and compare fees.” 

The schedule was unveiled in September 2015. The announcement came at the start of NASAA’s annual policy conference in Washington, D.C.