In investment, the bond credit rating represents the credit worthiness of corporate or government bonds. All missionaries must meet certain minimum standards of worthiness. Often there were arbitrary tests to judge the worthiness of their tax payments. Subsequently, the teachers focus extra effort on impressing Beau with their worthiness of the reward. White symbolizes purity, cleanliness, and worthiness, and equality. Some scientists dispute the worthiness of IQ entirely. Flirt and Wink are the next generation models that can support updated crash worthiness requirements. The balloon then needs a transport category C of A (certificate of air worthiness). Some outside observers have speculated about the blame worthiness of both parties. There were also structural modifications to improve crash worthiness for the 1997 to 1999 models. She often referred to this as an actor's "size" or "worthiness of the stage".