i am erikd wrote on 11/17/2014, 2:46 PM
There is too much to just make it simple but since you asked....
If you are running V13, do a loudness log output of your timeline. Scroll all the way to the bottom and make sure that your total is at least -23.

Marc S wrote on 11/17/2014, 9:37 PM
Here is an excellent tutorial from Sony NAB on Calm Act specifications and benefits.

Basically what you want is the Integrated LFUS meter (on the Vegas Loudness Meter) to be as close to -24db (in the USA) as possible without going over. It's worth watching the video to understand how to use these new specs to get the most out of your mix.
Butch Moore wrote on 11/17/2014, 9:43 PM
musicvid10 wrote on 11/17/2014, 9:50 PM
The European EU R128 standard is -23 LUFS.
The US ATSC A/85 (CALM) standard is -24 LKFS.

In most practical use, any program that meets US standards also meets European standards. The converse is not always true.

The most practical field guide for production are the NAB Best Practices:
Marc S wrote on 11/17/2014, 11:43 PM
Thanks for the correction. I'll change it above.