Nothing in this Act requires any public building, service, information or goods to be made accessible to persons with disabilities if the adaptation or modification involved, or the provision of auxiliary aids would -
(a) in the case of a service, information or goods including a service, information or goods made available in a public building, fundamentally alter the nature of the business, profession or trade of the person providing the service, information or goods, or
(b) constitute a risk to the health, safety or welfare of any person.