Timing of GST liability clarified: liability must be accounted in the tax period containing project completion or first occupation. Amendment revises Notification No. 06/2019 to require that GST liability for projects be accounted for 'in a tax period not later than the tax period in which the date of issuance of the completion certificate for the project, where required, by the competent authority, or the date of its first occupation, whichever is earlier, falls,' and substitutes wording to replace an earlier descriptive phrase with 'who shall,' clarifying the obligation-holder and imposing a definitive tax-period deadline for discharge of liability.