(4) (5) 583 Section 1 1 empowers the Rent Court to fix the standard rent at such amount, as having regard to the provisions of this Act and the circumstances of the case, the court deems just (a) where any premises are first let after the first day of September 1940, and the rent at which they are so let is in the opinion of the Court excessive; or (b) where the Court is satisfied that there is no sufficient evidence to ascertain the rent at which the premises were let in anyone of the cases mentioned in sub clause (i) to (iii) of clause (4) of sub section (10) of section 5; or (c) Where by reason of the premises having been let at one time as a whole or in part and another time in parts or a whole, or for any other reasons, any difficulty arises in giving effect to this part; or (d) Where any premises have been or are let rent free or at a nominal rent or for some consideration in addition to rent; or (e) Where there is any dispute between the land lord and the tenant regarding the amount of standard rent.