Valet parking is a service provided to customers of an establishment where possession of the vehicle is taken in the right-of-way for purpose of parking the vehicle and/or returning the vehicle to the operator. Typically, there is a fee charged by the Valet Operator for this type of service, but that is not required. There are established Valet Parking zones in the CBD and new applications for zones are evaluated as to location and proximity to other Valet Parking zones.
A half sibling is a brother or sister who has one parent in common with you (eg: you both have the same mother, but different fathers). A step-sibling is a sibling who is related to you only by marriage of parents. In other words, your mother or father marries somebody else who already has children.
A half-sister would mean that you either share a mother or father with her and you would be related by blood. A step-sister would have no blood relation to you but would be your sister by marriage. Ex: Your mother remarries and her new husband has a daughter. Hope this helps.