Vipul,
As per my knowledge if there are any pending dues and in absence of any agreement to the contrary , the same shall be the sole liability of the previous owner and not the current owner and because there was a specific clause in your registry regarding the liability of pending dues if any shall be borne by the seller, the same is the exclusive liability of the seller. There are several factors in play here, first of all promissory estoppel which binds the seller, secondly the consumer is always a person and not the building, iv contested a similiar matter before the UPCL and it went in favor of my client, though in my case we were action purchasers, nevertheless here are some citations which might be helpful in your case:
1. AIR 2006 Gujarat 190 Torrent power AEC Ltd v/s Shreeja Rakhi Lal wherein it was held that a consumer can only be a person.
2. 2008 UAD 191 M/s Sri Prabhu Sharan Ispat Ltd v/s UPC Ltd & others wherein it was held that auction purchaser cannot be held liable for default of previous owners.
3. AIR 2008 Madras 16 M/s Lietner Sriram Manufacturing Ltd v/s Chairman TNSEB & Others wherein proceedings to recover arrears from auction purchaser because of dues of previous owners was quashed.
4. Isha Marble’s v/s Bihar Seb & others i dont have its citation with me right now , it was held that
Electricity act S-24, 22, 3(2)(f) 2(c) 8th Schedule clause VIth , State financial corporation act S-29(1) CPC S-73
Held auction purchaser not liable to make liability of provisions owner.
as you can see these rulings are case specific ( mine) however im sure your lawyer might make some use of them.
Ashish