An L-2 spouse is employment-authorized incident to status and may work for any employer. She should keep documentation of the status for employment-verification purposes.
Authorization follows the status here
This is one of the more consequential differences between classifications for a household. The authorization arises from the status rather than from a separate application, and the admission record is the evidence an employer will want to see, so it should be checked immediately on arrival and corrected if the category or period is recorded wrongly. Children in this status may attend school but may not work at any age. Families sometimes plan a move on the principal's role alone and then find the spouse's position is either much better or much worse than assumed depending on the classification chosen. Confirming it in advance is a short conversation that avoids a long problem, and it should happen before either spouse gives notice to a current employer.
Hypothetical example: A robotics-parts company transfers its Canadian calibration specialist, while the spouse plans to accept a remote bookkeeping position after the move. The family should confirm the spouse’s admission documentation, the child’s school plans, and each person’s expected end date before travel. The document that matters for the spouse’s employment evidence is the correct admission record. The child’s dependent status allows study but not paid employment. Treat those as separate household decisions, since the principal’s technical assignment does not answer them.