Electronic commerce operator liability: ECOs must pay GST on platform-mediated housekeeping services unless the supplier is separately registered. Amendment designates the electronic commerce operator as liable to pay GST on house-keeping services such as plumbing and carpentering when supplied through an electronic commerce operator, by inserting a new clause into Notification No.17/2017 Central Tax (Rate). The provision excepts cases where the person supplying the service through the electronic commerce operator is required to register under the Central Goods and Services Tax framework, in which case the supplier remains the taxable person.