We have a project that is a renovation to part of a tenant's existing space. There are two existing single user toilet rooms (one for each sex) and one existing break room sink in the tenant's existing space, but they are not in the part that is being renovated. We don't know yet what the flush and flow rates are for the existing fixtures. Are we required to replace them if they don't meet the prerequisite? The tenant was not wanting to do any plumbing work on the project to save money.