While editing we generally do not have any additional material at the beginning of the Sequence, and we have the Timecode value of the first frame set to 01;00;00;00 (in the U.S.) or 10:00:00:00 (in the UK). It is very common to first add Filler to the beginning of the Sequence and then to add the Color Bars, Tone, and Slate into that region.
If you have not already read the previous Methods For Setting Sequence Timecode recipe, then you may find it helpful prior to reading this section if you are unfamiliar with that process.
This discussion presumes these two things:
You are using the NTSC broadcast standard (which uses Drop Frame Timecode), as discussed in the previous section. If you are not, then make adjustments to the recipe of steps as required.
You have already changed the starting Timecode value of your Sequence to 00;58;30;00 as discussed in the previous Methods For Setting Sequence Timecode recipe.