In what instances does the UK Housing Grants, Construction and Regeneration Act 1996 apply to the work?

In what instances does the UK Housing Grants, Construction and Regeneration Act 1996 apply to the work?

If work is carried out in the UK and is a ‘construction contract’ within the definitions in Sections 104 to 106 of the Housing Grants, Construction and Regeneration Act 1996, the Act applies and Option W2 must be used.