P ART 1 S COTTISH AGGREGATES TAX 5 C HAPTER 1 T HE TAX 1 The tax (1) A tax (to be known as Scottish aggregates tax) is to be charged on aggregate when it is subjected to commercial exploitation in Scotland. 10 (2) Revenue Scotland is responsible for the collection and management of the tax. 1 2 Overview of Part 1 (1) This Part is arranged as follows. (2) This Chapter establishes Scottish aggregates tax and provides an overview of Part 1 of the Act. 15 (3) Chapter 2 contains provisions about the key concepts underlying the tax, including— (a) which aggregate is taxable, (b) which aggregate is exempt from the tax, (c) what is commercial exploitation, and (d) who is liable to pay the tax. 20 (4) Chapter 3 contains provisions about the calculation of the tax, including— (a) how the tax is calculated, and (b) when credit is available in relation to the tax.