Do not assume that. Review each person’s actual activity and status before relying on family labor in the plan.
Assess support and permission together
Qualifying L spouses may be employment-authorized incident to status with appropriate evidence; children do not gain work permission solely as dependents. Family status alone does not establish available authorized staffing.
Once the petition is approved, write one page listing each family member, the status held, the admission record number and its expiry, and each child's date of birth. Employment authorization flows from the spouse's valid status, so the spouse does not depend on the transferring company for the right to work and is not restricted to a particular employer or occupation. If the spouse already has an independent immigration status, assess that situation separately rather than assuming everyone must use the principal’s dependent route. On the spouse's side the position is better: employment authorization arises from the status itself, so a spouse may take a job, subject to an employer's ordinary verification requirements. Keep children's schooling plans separate from questions about work authorization or aging out of dependent status, since the principal applicant's proposed start date does not automatically resolve those questions.