The spouse’s qualifying status and documentation determine the immigration work basis, not ownership of the employer’s system or the principal’s technical authorship.
Review family status separately from knowledge evidence
Qualifying L spouses are employment authorized incident to status with appropriate documentation. Children gain no work permission solely through L dependent status. A family connection to an inventor or employee does not itself establish these rights.
Hypothetical example: a groundwater modelling specialist's spouse is asked whether the family will hold rights in the employer's model once the transfer happens. The answer bears on neither person's status. A qualifying L spouse is employment authorized incident to status with appropriate documentation, and the evidence for that is the spouse's own status record rather than the principal's technical standing.
Children in L dependent status may study while maintaining status, and no contribution to the employer's system converts that into work permission. Plan the household around the dates that actually govern it: the principal's authorized period, each dependent's own admission and expiry, and any age condition that will be reached during the assignment. Record each family member's citizenship and current document, since the steps differ by nationality.
Where a spouse hopes to work, treat it as its own question at its own pace rather than something the transfer will settle. Ask as well what happens to dependents if the assignment ends early, because that is planning a family can do in advance.