FAR 61.75 is what you need.
You'll find it here.
http://ecfr.gpoaccess.gov/cgi/t/text...4/14tab_02.tpl
To get a usable CPL you'll need to take the CPL written and
a CPL checkride (Two checkrides if you want single and multi)
If you are instrument rated you'll need to do the IR Written as well if you want to add that.