9. The tribunal shall redress the rent that may be charged where:(1) the rent reduction granted by a lessor during the 12-month period preceding the period for which the rent is to be determined to allow his tenant to carry out repairs, renovations or install a new service at the tenant’s expense, proves to be greater than expenditures incurred;
(2) the lessor has remedied the situation that gave rise to the rent at the end of the lease being a reduction of rent under section 8.