Supply exclusion amended to omit supplies between persons listed under section 51(1), narrowing notification applicability. The Government inserted a proviso in Notification No. 50/2018 State Tax stating that the notification shall not apply to supplies of goods or services between persons specified under clauses (a), (b), (c) and (d) of sub section (1) of section 51 of the Act, thereby excluding such inter party supplies from the notification's application.