(2)The cess levied under sub-section (1) shall be collected from every employer undertaking building or other construction work in such manner and at such time, including deduction at source in relation to a building or other construction work of a Government or of a public sector undertaking or advance collection through a local authority where an approval of such building or other construction work by such local authority or such other authority notified by the State Government is required, as may be prescribed by the Central Government.