Quote:
9. Dependents of an H, Temporary Worker
If you are filing for an extension/change of status as the dependent of an employee who is an H temporary worker, .....
The person is not filing for a COS as the Dependent of an H1B to extend their H4 status or to change their status to H4, which is the part of the I-539 you are quoting is referring to.
Quote:
I-129, Petition for a Nonimmigrant Worker
.....
Purpose of Form
For petitioners filing on behalf of an alien to come to the United States temporarily to perform services or labor, or to receive training, as an H-1B, H-1C, H-2A, H-2B, H-3, L-1, O-1, O-2, P-1, P-1S, P-2, P-2S, P-3, P-3S, Q-1 or R-1 nonimmigrant worker. Petitioners may also use this form to request an extension of stay in or change of status to E-1, E-2, E-3, H-1B1 or TN, or one of the above classifications for an alien.