CALM act is the responsibility of service/content provider, not end user. You don't need to do a thing (and really nothing you can do about it other than turn the volume down). If Verizon doesn't comply, you can report them to FCC. On the other hand, IIRC, this act was just recently passed. As always, you can expect that there will be months or years before it can be enforced.
You can also spend $$$ to buy some expensive high end receivers that includes functionalities to auto-level the loud commericals. But why spent your own money to do that when it is your service provider who is responsible.