Bill generated on 29 june but delivery in 10 july

In this case the 'TIME OF REMOVAL' is important . If you generate invoice in current tax regime on 29th and removal of goods at the same time you dont want E-Way bill under GST. But, You can remove the goods on or after GST regime you ll be generate e-way bill and GST Invoice at your end...

There is no consensus on e-Waybill in the GST Rules which now reads as, "Till  such  time  as an  E-way  bill  system  is  developed  and  approved  by  the  Council,  the  Government may,  by  notification,  specify  the  documents  that the person  in  charge  of  a  conveyance  carrying  any consignment of goods shall carry while the goods are in movement or in transit storage"

The alternate rule prevailing in the GST regime will be the one in the existing tax regime until such time that the e-Waybill Rules under GST is consolidated and formalised for compliance