The discussion in the preceding paragraph f this Judgment provides an answer to 474 A the question as to how the rateable value of this category of premises is to be determined when the premises at the first stage of construction are to be assessed for rateable value, the assessing authorities would first have to determine the standard rent of the premises under sub section (2) (a) or 2 (b) or (1) (A) (2) (b) or (I) (B) (2) (b) of Section 6 as may be applicable and keeping in mind the upper limit fixed by the standard rent and taking into account the various factors discussed above, the assessing authorities would have to determine the rent which the owner of the premises may reasonably expect to g t if the premises are let out to a hypothetical tenant and such rent would represent the rateable value of the premises When any addition is made to the premises at a subsequent stage, three different situations may arise.