provided, however, that where a property receives income from sources other than housing accommodations, the computation of the maximum gross building rental shall include only that part of the total real estate taxes, water rates and sewer charges and allowance for return on capital value which bears the same proportion to the total of such items as the maximum gross building rental bears to the sum of such rental plus the total income from the other souces, so that the maximum gross building rental shall be computed as follows:
MGBR =(MGBR x (RET + WS + RCV) + OM + VCL/MGBR + CI)
where
MGBR =Maximum gross building rental
CI =Commercial income
RET =Real estate taxes
WS =Water charges and sewer rents
RCV =Allowance for return on capital value
OM =Allowance for operating and maintenance expenses
VCL =Allowance for vacancy and collection losses.
$265.58
plus $0.36 times the number of housing accommodations in the building,
plus $73.32 times the average number of rooms per housing accommodation in the building,
plus $2.15 times the age factor for the building, as defined in paragraph (4) of this subdivision.
$315.11
plus $0.09 times the number of housing accommodations in the building,
plus $128.31 times the average number of rooms per housing accommodation in the building,
plus $2.93 times the age factor for the building, as defined in paragraph (4) of this subdivision,
plus the amount by which the expenses for labor per housing accommodation per year exceed $300.
where
MGBR = Maximum gross building rental
RIV =Sum of room index values (as defined above)
(C) =Portion allocated to controlled housing accommodations
(T) =Total.
MBR = MGBR x(R(F)/Total R(F))
Where MBR =Maximum base rent (for an individual housing accommodation)
MGBR =Maximum gross building rental (as adjusted, if necessary, pursuant to paragraph (2) of this subdivision
R(F) =Room index value, adjusted for floor located, of the individual housing accommodation
Total R(F) =Sum of room index values, adjusted for floor location.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 2201.4