The main purpose of the Corporation Tax Bill is to rewrite the charge to corporation tax and the primary corporation tax legislation used by companies in computing their income. The main provisions that the Bill contains are the basic corporation tax provisions including the charge to tax, accounting periods and provisions relating to residence. Also provisions relating to trading and property income and income from other sources, special provisions for companies affecting the calculation of income, such as those for loan relationships, derivative contracts and intangible fixed assets. And provisions governing particular types of expenditure eg., expenditure on research and development and films.