Centralized billing registration and expedited invoicing introduced, with revised service tax payment timelines and recipient clarification. Amendments clarify that where a mutual fund distributor obtains distribution services, the mutual fund or asset management company receiving the service is the recipient for service tax. Assessess with centralized billing or accounting may elect registration at premises housing those centralized systems; registrations are granted by the authority in whose jurisdiction the providing premises and centralized systems are located, with prior registrations preserved. Assessess without centralized systems must seek separate registration for each premises. Providers must act within fourteen days from completion of service or receipt of payment, and service tax payment timing is set with a monthly deadline and a quarterly option for certain small taxpayers; tax is not chargeable for services provided during non-taxable periods.