The default zero limit on the crediting of purchased carbon units, as set out in the new section 5A, along with this power to increase that limit for the specified future years, replace both the domestic effort target (section 8), which is repealed in the Schedule and the limits on the use of carbon units (section 21 and Orders made under this) under the 2009 Act. The EN state 2Scottish Parliament. (2018, May 23).