(1)The Scottish Ministers may by regulations provide that a person who—
(a)is, under a charges scheme, liable to pay an amount to Scottish Water or, by virtue of section 37, to a local authority, and
(b)fulfils such conditions as are specified in the regulations,
is instead exempt from such liability or liable to pay the reduced amount referred to in subsection (2).
(2)The reduced amount is an amount—
(a)less than the amount it would be but for the regulations, and
(b)determined in accordance with rules specified in the regulations.
(3)The conditions and rules to be specified in regulations under subsections (1)(b) and (2)(b) respectively may be determined by reference to such factors as the Scottish Ministers think fit.