Rates and times for a session will be agreed prior to the day of the shoot.

Models will be expected to arrive on time. The session paid for begins from the agreed time or the time when the model arrives ready to start work, whichever is the latter. If models arrive too late to make the session practical then they will forfeit their right to payment for the session. 

If the photographer or other required studio personnel (e.g. make-up person) is late then the model will still get paid for their time.