Rule 5 of Integrated Goods and Services Tax Rules, 2017
The supply of services attributable to different States or Union territories, under subsection (7) of section 12 of the said Act, in the case of-
(a) services provided by way of organisation of a cultural, artistic, sporting, scientific, educational or entertainment event, including supply of services in relation to a conference, fair exhibition, celebration or similar events; or
(b) services ancillary to the organisation of any such events or assigning of sponsorship to such events,
where the services are supplied to a person other than a registered person, the event is held in India in more than one State or Union territory and a consolidated amount is charged for supply of such services, shall be taken as being in each of the respective States or Union territories, and in the absence of any contract or agreement between the supplier of service and recipient of services for separately collecting or determining the value of the services in each such State or Union territory, as the case maybe, shall be determined by application of the generally accepted accounting principles.
Illustration : An event management company E has to organise some promotional events in States S1 and S2 for a recipient R. 3 events are to be organised in S1 and 2 in S2. They charge a consolidated amount of Rs. 10,00,000 from R. The place of supply of this service is in both the States S1 and S2. Say the proportion arrived at by the application of generally accepted accounting principles is 3:2. The service shall be deemed to have been provided in the ratio 3:2 in S1 and S2 respectively. The value of services provided will thus be apportioned as Rs. 6,00,000/- in S1 and Rs. 4,00,000/- in S2.