4(1)A gain accruing on a disposal is not a chargeable gain if it accrues on—U.K.
(a)a disposal arising as a result of the forfeiture or surrender of rights, or as a result of refraining from exercising rights, in return for a qualifying payment,
(b)a disposal of the right to receive the whole or any part of a qualifying payment, or
(c)a disposal of an interest in any such right.
(2)In sub-paragraph (1)(c) “interest”, in relation to a right, means an interest as a co-owner of the right (whether it is owned jointly or in common and whether or not the interests of the co-owners are equal).
(3)This paragraph has effect—
(a)in a case where the qualifying payment concerned is within paragraph 2(2) or (3), in relation to disposals made on or after 3 April 2019,
(b)in a case where the qualifying payment concerned is within paragraph 2(4), in relation to disposals made on or after 29 May 2020, and
(c)in a case where the qualifying payment concerned is within paragraph 2(5), in relation to disposals made on or after such date as is specified in the regulations concerned (which may be a date before the regulations are made).