To certify or license someone for something.
To throw and catch each object at least twice.
To compete successfully in some stage of a competition and become eligible for the next stage.
To make someone, or to become competent or eligible for some position or task.
To modify, limit, restrict or moderate something; especially to add conditions or requirements for an assertion to be true.
To give individual quality to; to modulate; to vary; to regulate.
To describe or characterize something by listing its qualities.
An instance of throwing and catching each prop at least twice.