Excise duty on aviation turbine fuel for RCS UDAN flights extended, continuing concessional levy for eligible operators. Amendment revises the concession's temporal scope to expire three years from commencement of operations of an RCS UDAN airport, heliport or waterdrome or at the end of the scheme period, whichever is earlier, and substitutes the tariff table entry to treat aviation turbine fuel drawn by selected airline or cargo operators for RCS UDAN flights from such aerodromes under the concessional basic excise provision; effective 26th August, 2019.