Builder is owner of land as no conveyance has been executed in favour of society 

builder can apply for sub division of plot without society consent 

if conveyance is executed in favour of society then society permission is necessary for sub division of plot 

1. YES, the developer can change or subdivide the plot, PROVIDED the Society GB passes a resolution to that affect and Society signs as "Consenting & Confirming Parties" alongwith the developer in the relevant Deed & Documents.

2. Without above the Developer CANNOT do anything, whatsoever, AFTER the Society was registered. This has been upheld in several HC judgments.

VISIT:

Nobody can change the CTS or city survey no. It is illegal.

NO. Society can file FIR of trespass/mischief and creating nuisance against builder

Any such act carried out by the builder after the society is formed and handed over possession to the society especially after having obtained OC for the flats, shall be considered as an illegal act.

You can drag the builder to the court of law by terming such acts as illegal and cheating offence seeking releif and remedy for this

CTS number is the identification number in the government records to identify a land. All records related to a property are based on this number. CTS number Cannot be changed.

1. No builder cannot subdivide a plot which is under society without permission of society  

Society permission needed if conveyance done

1. As per the information mentioned in the present query, makes it clear that OC was of prior date and society get registered thereafter.
2. Yes, the right to raise objections is always available with the aggrieved person.
3. There can be a complainant made to the RERA or to the civil court of law for the enforcement of any contract if exists.