Change in static disability

I’d appreciate opinions on a veteran awarded a disability classified as “static.” Prior to 5 years passing, he requests an increase which results in the a new C&P. If no improvement in disabilities (or if they got worse and the VA awarded a higher rating), can the VA drop the “static” classification and advise a future exam will be required? Or, does it have to be classified as static because that is what it was before? Anyone have any experience on this situation?