If the position requires state licensure and that process is still open, the household's move should wait for clarity on timing rather than assume the principal applicant's work can begin on the original schedule. Spouses and children would travel on a dependent basis, without independent work authorization from that status.
Tie the household schedule to the licensing answer
A firm's preferred start date is not the same as a confirmed one when licensing is unresolved. Ask the employer for a realistic range rather than a single date, and hold major decisions such as housing deposits or school enrollment until the credential and licensing questions are answered. If a spouse plans to work in the US, that is a separate assessment from the architect's own filing.
Two entries belong on that same list. Name the person in the household who will check each dependant's permitted activities against what the family has been assuming, and have them work from the status that person would actually hold rather than from the principal's, since a plan quietly counting on a second income fails in a way that is expensive to reverse. And confirm each passport's expiry against the whole intended period, together with any age threshold that falls inside it, because eligibility as a dependent child is limited to unmarried children under twenty-one and a birthday can quietly change the plan.
Put every date on one page. Hypothetical example: a household moving with an architect who designs salon and spa interiors writes the dates out once and finds a passport expiry, a licensing decision and a child's twentieth birthday all falling within the same six months.