The L-1B knowledge assessment does not create a different dependent category from L-1A. Eligible spouses and unmarried children under 21 may seek L-2; assess their individual steps and activities.
Keep each person’s record separate
A qualifying L-2 spouse is employment authorized incident to status. Children do not gain that permission through L-2. The employee’s technical evidence does not replace family documentation.
Prepare the family records on their own schedule, since they depend on civil registries rather than on the employer, and those offices work to their own timetables. Identify for each person the document proving the relationship, the document proving identity, and any record explaining a difference in name or spelling between the two. Where a marriage or birth was registered outside Canada, ask early what form of copy the process will accept, because obtaining a second copy from a distant registry is the step most likely to overrun.
Keep the household's plans in writing as well: whether a spouse expects to work, whether a child expects to enrol, and what each of those would require. Those answers are separate from the specialised knowledge question and are not improved by it, so treat them as a parallel task with its own owner and its own deadline. Nothing in the employee's technical file shortens that work.