Dear Sir,
It is common sense each resident has to pay the same as per his occupation. The Karnataka has its own rules even then the associations/managements not following the same. Better you approach the High Court and get blank direction against all the associations/managements to be implemented by the concerned government department.
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http://apartmentadda.com/blog/2012/01/10/guide-to-maintenance-charge-calculation-in-apartments/
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Deciding on the Method of Calculating Maintenance Charges
Most debates centre around the decision of making the charges on the basis of sq.ft. of each Flat or on a uniform basis where every flat pays equal Society Charges. This debate gets more pertinent in Societies with high variation in the area of the Flats.
There are a few popular methods of calculating maintenance charges. They are as follows:
A. Per Square Feet Charge:
This happens to be the method which is most used for calculating maintenance charges for housing societies. As a part of this method, a fixed rate is charged per square feet of area of an apartment.
Say, the per square feet maintenance charge for an apartment complex is Rs. 3.0 per sq feet per month. Therefore, if one owns an apartment of 1000 sq. ft, then the maintenance charge is Rs 3000 per month. And by the same calculation, a person owning an apartment of 2000 sq. ft would pay a maintenance charge of Rs. 6000 per month.