Definitions of subject to
be subject to something in a situation where it/they must obey a rule, regulation or law etc
Such plea bargain agreements are subject to the approval of the court.
be subject to something likely to experience something or to be affected by something
My client has since been subject to severe headaches.
if one event is subject to another event then the holding of the first event depends on whether and how the second event happens; depending on the stated thing happening
We would be pleased to offer you the lease, subject to our receipt of a reference from your current or previous landlord.