As notification are attach below, there is mention about TOS under sec 12 which clarify GST liablity raise when last date of issue of invoice date of issue of invoice, whichever is earlier
soo this exemption is available for all.there is no time limit for anyone
it is supercession of notification 40/2017
Notification No. 66/2017 – Central Tax
New Delhi,
the 15th November, 2017
G.S.R. (E):— In exercise of the powers conferred by section 148 of the Central Goods and
Services Tax Act, 2017 (12 of 2017) (hereafter in this notification referred to as the said Act)
and in supercession of notification No. 40/2017-Central Tax, dated the 13th October, 2017,
published in the Gazette of India, Extraordinary, Part II, Section 3, Sub-section (i) vide
number G.S.R.1254(E), dated the 13th October, 2017, except as respects things done or
omitted to be done before such supercession, the Central Government, on the
recommendations of the Council, hereby notifies the registered person who did not opt for the
composition levy under section 10 of the said Act as the class of persons who shall pay the
central tax on the outward supply of goods at the time of supply as specified in clause (a) of
sub-section (2) of section 12 of the said Act including in the situations attracting the
provisions of section 14 of the said Act, and shall accordingly furnish the details and returns
as mentioned in Chapter IX of the said Act and the rules made thereunder and the period
prescribed for the payment of tax by such class of registered persons shall be such as
specified in the said Act.
[F. No. 349/58/2017-GST(Pt)]