Alex Goldman writes a nice article that includes many important details about CALEA, compliance, and extensions. [here]
On extensions & 445:
"Similarly, you can file for a CALEA extension, but you have to submit a plan for complying. The form you should have already filed (on February 12, 2007) is Form 445 (.pdf). This details how close you are to being complaint. In order to file the form, you need to obtain an FCC Registration Number, which your lawyer can help you do."
On the standard:
"ATIS ... published its Lawfully Authorized Electronic Surveillance (LAES) For Internet Access and Services in March, 2007. Unfortunately, ATIS sells the documents describing its standards, and retains the copyright, so we can neither read nor cite them (price is $185 for an electronic copy and $164 for an electronic download)."