On the Part 1B form, when should I check 'For Information Only'?
You would check “For Information Only” when there is no NPAC action required, and the Part 1B will not be sent to NPAC. For additional information, refer to Section 5.1.3 of the ATIS-0300119, Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG).