Hero Motocorp — hero honda slender plus bs compliance.

I purchased motor cycle in 2005 at bokaro steel city jharkhand. Shifted to howrah and like to get registration no. Changed. West bengal rto office needs bs compliance for new registration which is not mentioned in manual or anywhere else. Details of byke as follows.
Model spl +
Engine no. 05e15m28917
Chassis no. 05e16c28359
Date of purchase 29/05/05
Contacted bokaro dealer but they say when not mentioned in manual, only higher up can help. Pl. Provide me the compliance standard of the model.