The following provision shall be substituted for subsection (1) of section fifteen of the principal Act which relates to matters to be referred to arbitration):—
“(1)Any question or difference between the landlord and the tenant of a holding arising out of any claim by the tenant against the landlord for compensation under this Act or any Act by this Act repealed, or out of any claim by either party against the other for breach of contract or otherwise in respect of the holding or out of any claim by the landlord against the tenant for waste wrongly committed or permitted by the tenant, or as to the construction of the lease, and any other question or difference of any kind whatsoever between the landlord and the tenant arising out of the tenancy or in connection with the holding (not being a question or difference as to liability for rent) shall, whether such question or difference arises during the currency or on the termination of the tenancy, be determined by arbitration.”