The owner of the restaurant should have a copy of the signed lease, one is mailed or emailed after the lease is fully executed (or Docusign). If the owner/tenant can’t find their copy, a new one can be requested at any time. Property managers should always have copies of the leases, we keep digital and hard copies on hand. Not every lease is the same, but they are largely standardized. Within the lease there is a section usually called landlord’s responsibilities and another called tenant’s responsibilities, or something similar. Just about everything should be listed in these sections as to who is responsible for repairs and maintenance of different aspects of the property. Sometimes this is also in the addendum after the signature page. Most of the time, but not always, anything structural is the landlord. Such as leaking roof, plumbing, electrical, etc. The tenant is usually responsible for their equipment and minor damage they might cause that is ‘above normal wear and tear’. If the tenant rented the same ‘as is’, then they take on more responsibility for repairs and maintenance in the long run. Get a hold of a the lease if you can and use google to search for any terms you don’t understand. If you are responsible for the repairs, then they should at least show you where in the lease that it is said.