On 1st cite:
Social Services and Well-being (Wales) Act 2014 [SSWWA]
Subsequent cites:
SSWWA 2014
Citing a specific section of an act: Examples:
S.5 of the Social Services and Well-being (Wales) Act 2014 states that…
OR
According to s.5 of the Social Services and Well-being (Wales) Act 2014…
OR
The well-being of carers must be promoted (Social Services and Well-being (Wales) Act 2014, s.5).
Acts should not be included in APA reference lists at all. However, on the first mention of the act a full citation is given in the text of your assignment.