When must brokerage firms send 1099 DIV/INT/B forms?

One of the brokerage firms that handles my investments commonly sends my combined 1099 form early March.  In the 6 years I've worked with this brokerage, twice they've sent corrected statemetns that came out mid\late March.   Isn't there a federal or IRS related law that states they must provide 1099 forms by mid February?  My other brokerage firm meets this deadline without issue.